CN117829026A - Fluid multi-physical field coupling simulation calculation method of magnetic resonance compatible transfer incubator - Google Patents
Fluid multi-physical field coupling simulation calculation method of magnetic resonance compatible transfer incubator Download PDFInfo
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Abstract
The embodiment of the application provides a fluid multi-physical field coupling simulation calculation method of a magnetic resonance compatible transfer incubator, which comprises the following steps: three-dimensional modeling is carried out on the transfer incubator by utilizing SOLIWORKS or UG three-dimensional modeling software; extracting a fluid domain from the three-dimensional model by using Space Claim software, generating a fluid domain model, and setting boundary conditions of the fluid domain model; determining a motion state of fluid in the transfer incubator, and selecting a corresponding calculation module based on the determined motion state; setting an environmental condition in Fluent software, and meshing a fluid domain model with set boundary conditions in the Fluent software with set environmental condition; and carrying out solution setting on the three-dimensional model in Fluent software, and carrying out simulation calculation on the fluid domain model with the mesh split in the Fluent software with the solution setting completed through a calculation module to generate a simulation result.
Description
Technical Field
The application relates to the technical field of incubators for magnetic resonance environments, in particular to a fluid multi-physical field coupling simulation calculation method for a magnetic resonance compatible transfer incubator.
Background
The premature infant born every year in China is about 120 ten thousand, and the premature infant has small gestational age and light weight, is easy to have a series of complications, such as untimely diagnosis and treatment, and the body and intelligence of the child can be seriously damaged, even die, or cause lifelong disability due to the optimal treatment time of mussels. The magnetic resonance scanning is the best mode of brain disease inspection accepted by the current medical image industry, can deeply reflect the brain condition, avoids the problems of ionizing radiation, month age limit and incomplete inspection existing in DR, CT and craniocerebral B ultrasonic inspection, and provides possibility for early discovery, early treatment and early rehabilitation of the brain disease of infants. Premature infants who are clinically unseparated from the incubator are in urgent need of magnetic resonance scanning, but the current technology fails to provide this condition, and therefore the best treatment timing can be missed to cause life-long disability and even death.
The development of the neonate infant transfer incubator creates favorable conditions for short-distance neonate transfer in a hospital and building a comfortable and safe transfer environment. However, the current ability to be compatible with magnetic resonance and to meet in-box environmental control parameters suitable for infant examinations is not yet accurate enough, which limits the successful development of magnetic resonance compatible transport incubators. Only germany LMT, us SREE, and israel ASPECT are currently internationally available. The products of LMT and SREE can be used for imaging scanning on 1.5T and 3.0T superconducting magnetic resonance equipment, realize functions of constant temperature, sign monitoring, oxygen supply and the like, provide conditions for infants to scan in a magnetic resonance environment, but have poor equipment compatibility, maintain inaccurate in-box environment parameter control of vital signs, and reduce the safety and accuracy of infant magnetic resonance examination, so that the acquisition precision and stability are required to be further improved in the aspects of core temperature control and vital sign monitoring.
Accordingly, the prior art has drawbacks and needs to be improved and developed.
Disclosure of Invention
The embodiment of the application provides a fluid multi-physical field coupling simulation calculation method of a magnetic resonance compatible transfer incubator, which enables simulation results of parameters of multiple physical fields in the incubator to be closer to the real environment of an infant through joint simulation of the multiple physical fields, avoids certain safety risks to the infant due to deviation of the parameters of temperature, air flow speed and the like in the incubator, and improves safety and accuracy in the process of transferring and magnetic resonance inspection of the infant.
The embodiment of the application provides a fluid multi-physical field coupling simulation calculation method of a magnetic resonance compatible transfer incubator, which comprises the following steps:
three-dimensional modeling is carried out on the transfer incubator by utilizing SOLIWORKS or UG three-dimensional modeling software, and simplification processing is carried out on the obtained three-dimensional model;
performing fluid domain extraction on the simplified three-dimensional model by using Space Claim software to generate a fluid domain model, and performing boundary condition setting on the fluid domain model;
determining a motion state of fluid in the transfer incubator, and selecting a corresponding calculation module based on the determined motion state;
setting an environmental condition in Fluent fluid coupling field simulation software, and meshing the fluid domain model with the set boundary condition in the Fluent fluid coupling field simulation software with the set environmental condition;
and carrying out solving setting on the three-dimensional model in the Fluent fluid coupling field simulation software, and carrying out simulation calculation on the fluid domain model with the mesh split in the Fluent fluid coupling field simulation software with the solving setting completed through the calculation module to generate a simulation result, wherein the simulation result comprises fluid temperature and speed field distribution data in the transfer incubator.
In the fluid multi-physical field coupling simulation calculation method of the magnetic resonance compatible transfer incubator according to the embodiment of the application, when grid segmentation is performed on the fluid domain model with the set boundary conditions in the Fluent fluid coupling field simulation software with the set environmental conditions, grid refinement is performed on the heat source, the rotor region, the radio frequency coil coverage space region and the space region above the bed board of the transfer incubator, and the fluid boundary layer grid is set.
In the method for simulating and calculating the fluid multiphysics field coupling of the magnetic resonance compatible transport incubator according to the embodiment of the present application, the motion state includes laminar flow and turbulent flow, and the determining the motion state of the fluid inside the transport incubator includes:
and determining the motion state of the fluid in the transfer incubator according to a Reynolds number calculation formula, specifically, determining the motion state of the fluid in the transfer incubator as turbulent flow when the Reynolds number is larger than 2300, and determining the motion state of the fluid in the transfer incubator as laminar flow when the Reynolds number is smaller than 2300.
In the method for simulating and calculating the fluid multiple physical fields of the magnetic resonance compatible transport incubator according to the embodiment of the present application, the fluid field extraction of the simplified three-dimensional model by using Space Claim software includes:
and deleting redundant fillets, long strip surfaces, holes, facets and short edges of the simplified three-dimensional model by using Space Claim software, and filling air domains and thin layers.
In the method for calculating the fluid multi-physical field coupling simulation of the magnetic resonance compatible transport incubator according to the embodiment of the present application, after the simulation result is generated, the method further includes:
and adopting the Fluent fluid coupling field simulation software to carry out visualization processing on the simulation result, verifying the simulation result and generating a verification report.
In the method for simulating and calculating the fluid multi-physical field coupling of the magnetic resonance compatible transfer incubator according to the embodiment of the application, the solving setting comprises a solving method setting, a solution control setting, a residual setting, an initializing setting, an operation calculation setting and a data storage setting.
In the fluid multi-physical field coupling simulation calculation method of the magnetic resonance compatible transfer incubator disclosed by the embodiment of the application, the boundary conditions comprise a free air inlet, an air supply outlet, an air return outlet, a shell, a heater and a rotor.
In the method for simulating and calculating the fluid multi-physical field coupling of the magnetic resonance compatible transport incubator according to the embodiment of the application, the environmental working conditions comprise environmental temperature, absolute pressure and relative humidity.
In the fluid multi-physical field coupling simulation calculation method of the magnetic resonance compatible transfer incubator, the environmental working conditions further comprise heat convection exchange coefficients of the incubator body of the transfer incubator and the surrounding environment.
In the fluid multi-physical field coupling simulation calculation method of the magnetic resonance compatible transport incubator, the mesh is an automatic mesh or a tetrahedral mesh or a hybrid mesh.
According to the fluid multi-physical-field coupling simulation calculation method for the magnetic resonance compatible transfer incubator, firstly, three-dimensional modeling is conducted on the transfer incubator through SOLIWORKS or UG three-dimensional modeling software, simplification processing is conducted on the obtained three-dimensional model, then fluid domain extraction is conducted on the simplified three-dimensional model through Space Claim software, a fluid domain model is generated, boundary condition setting is conducted on the fluid domain model, then the motion state of fluid in the transfer incubator is determined, a corresponding calculation module is selected based on the determined motion state, then environment working conditions are set in Fluent fluid coupling field simulation software, grid division is conducted on the fluid domain model with the set boundary conditions in Fluent fluid coupling field simulation software with the set environment working conditions, finally, solving setting is conducted on the three-dimensional model in Fluent fluid coupling field simulation software, simulation calculation is conducted on the fluid domain model with the set grid division through the calculation module, and a simulation result is generated, and the simulation result comprises fluid temperature and speed field distribution data in the transfer incubator. According to the embodiment of the application, through the joint simulation of multiple physical fields, the simulation result of the parameters of the multiple physical fields in the box body is closer to the real environment where the infant is located, so that certain safety risks to the infant due to the deviation of the physical parameters such as the temperature, the air flow speed and the like in the box body can be avoided, and the safety and the accuracy in the infant transportation and magnetic resonance inspection process are improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a fluid multi-physical field coupling simulation calculation method of a magnetic resonance compatible transport incubator according to an embodiment of the present application.
Fig. 2 is another flow chart of a fluid multi-physical field coupling simulation calculation method of a magnetic resonance compatible transport incubator according to an embodiment of the present application.
Fig. 3 is a three-dimensional modeling and simplified diagram of a magnetic resonance compatible transport incubator provided in an embodiment of the present application.
Fig. 4 is a grid sectional view of a fluid domain model provided in an embodiment of the present application.
Fig. 5 is an overall velocity field profile of a transport incubator provided in an embodiment of the present application.
Fig. 6 is a rotor area velocity field profile provided by an embodiment of the present application.
Fig. 7 is a graph of a rotor region temperature field profile provided in an embodiment of the present application.
Fig. 8 is a flow field distribution diagram of a tank according to an embodiment of the present application.
Fig. 9 is a solid and air heat transfer diagram provided in an embodiment of the present application.
Fig. 10 is a thermal flow diagram of a tank provided in an embodiment of the present application.
Fig. 11 is a graph showing a local area heat flow profile provided in an embodiment of the present application.
Reference numerals illustrate:
1-radio frequency coil 2-right side air outlet 3-return air inlet in box
4-free air inlet 4 5-heater 6-right air supply outlet
7-rotor 8-left air supply outlet 9-bed body
10-left air outlet in box body
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present application based on the embodiments herein.
The embodiment of the application provides a fluid multi-physical field coupling simulation calculation method of a magnetic resonance compatible transfer incubator.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic flow chart of a magnetic resonance compatible transport incubator fluid multi-physical field coupling simulation calculation method according to an embodiment of the present application, and fig. 2 is another schematic flow chart of a magnetic resonance compatible transport incubator fluid multi-physical field coupling simulation calculation method according to an embodiment of the present application. The method may comprise the steps of:
and step 101, carrying out three-dimensional modeling on the transfer incubator by utilizing SOLIWORKS or UG three-dimensional modeling software, and simplifying the obtained three-dimensional model.
The method comprises the steps of carrying out three-dimensional modeling on a magnetic resonance compatible transfer incubator (transfer incubator) by adopting professional Solidworks or UG software, and simplifying the three-dimensional modeling so as to meet the requirement of Space Claim software on the structural optimization of a three-dimensional model.
As shown in fig. 3, fig. 3 is a three-dimensional modeling and simplified diagram of a magnetic resonance compatible transfer incubator according to an embodiment of the present application, including a case (not shown in the figure), a radio frequency coil 1 and a bed 9 disposed in the case, a return air inlet 3 and an air supply outlet (a left air supply outlet 8 and a right air supply outlet 6) disposed on the case, a heater 5 and a rotor 7 (a rotor fan) disposed outside the case, a free air inlet 4, a left air outlet 10 in the case, and a right air outlet 2 in the case.
Wherein, the compatible transport incubator of magnetic resonance theory of operation that this application embodiment provided is: after the fan (rotor 7) of the transfer incubator is started, air in the incubator body is sucked out from the return air inlet 3 under the suction action of the fan (rotor 7) and mixed with fresh air entering from the free air inlet 4, and then after being heated by the heater 5, the air is blown into the incubator body from the air supply outlets (the left air supply outlet 8 and the right air supply outlet 6) on two sides of the bottom through the rotation of the fan (rotor 7), and is discharged from the air outlets (the left air outlet 10 in the incubator body and the right air outlet 2 in the incubator body) on two sides below the bed body 9 in the incubator body, and then slowly floats upwards and then is discharged from the return air inlet, so that a periodic air supply and return circulation is formed.
And 102, performing fluid domain extraction on the simplified three-dimensional model by using Space Claim software, generating a fluid domain model, and setting boundary conditions of the fluid domain model.
The fluid domain is extracted from a path through which fluid in the transfer incubator flows on the premise of not influencing simulation results and accuracy, and a fluid domain model is generated.
In some embodiments, the fluid domain extraction of the simplified three-dimensional model using Space class software includes:
and deleting redundant fillets, long strip surfaces, holes, facets and short edges of the simplified three-dimensional model by using Space Claim software, and filling air domains and thin layers.
And deleting the redundant structure of the simplified three-dimensional model by using Space Claim software to enable the redundant structure to meet the further operation requirement of Fluent software.
In some embodiments, the boundary conditions include free air intake, air supply, air return, housing, heater, and rotor.
After the fluid domain extraction is completed in Space class software, the fluid domain and boundary conditions are set, specifically, a free air inlet, an air supply port, an air return port, a shell, a heater, a rotor and the like can be designated, and then the fluid domain is imported into Fluent software for further confirmation.
Step 103, determining the motion state of the fluid in the transfer incubator, and selecting a corresponding calculation module based on the determined motion state.
In some embodiments, the motion state comprises laminar flow and turbulent flow, and the determining the motion state of the fluid inside the transport incubator comprises:
and determining the motion state of the fluid in the transfer incubator according to a Reynolds number calculation formula, specifically, determining the motion state of the fluid in the transfer incubator as turbulent flow when the Reynolds number is larger than 2300, and determining the motion state of the fluid in the transfer incubator as laminar flow when the Reynolds number is smaller than 2300.
The method comprises the steps of determining the motion state of fluid in a transfer incubator according to a Reynolds number calculation formula, wherein the Reynolds number Re=ρ×u×d/mu (ρ is fluid density, the unit is kg/m3, u is characteristic flow speed, the unit is m/s, d is characteristic length, the unit is m, mu is hydrodynamic viscosity), the critical Reynolds number Re is 2300 in engineering application, and when Re is smaller than 2300, the flow is laminar; when Re > 2300, the flow is considered turbulent. The analytical model of the present example was run with reynolds numbers above 8000 and calculated as turbulence.
And 104, setting an environmental condition in Fluent fluid coupling field simulation software, and meshing the fluid domain model with the set boundary condition in the Fluent fluid coupling field simulation software with the set environmental condition.
As shown in fig. 4, fig. 4 is a split view of a fluid domain model mesh provided in an embodiment of the present application.
In some embodiments, the ambient conditions include ambient temperature, absolute pressure, and relative humidity.
In some embodiments, the environmental conditions further comprise a heat convection coefficient of the tank of the transport incubator and the surrounding environment.
And 105, carrying out solution setting on the three-dimensional model in the Fluent fluid coupling field simulation software, and carrying out simulation calculation on the fluid domain model with the mesh split in the Fluent fluid coupling field simulation software with the solution setting completed through the calculation module to generate a simulation result, wherein the simulation result comprises fluid temperature and speed field distribution data in the transfer incubator.
The fluid field model is simulated and calculated by adopting Fluent fluid coupling field simulation software, and the maximum rotating speed of the fan is 1500rpm; temperature: 30-40 ℃;2 operating conditions (single fan operation and 2 fans simultaneously).
The simulation calculation shows that the distribution data of the fluid temperature and the velocity field in the transfer incubator are obtained, so that whether the temperature and the velocity distribution in the transfer incubator meet the regulation standards and the design requirements is determined.
In some embodiments, when grid segmentation is performed on the fluid domain model with the set boundary conditions in the Fluent fluid coupling field simulation software with the set environmental conditions, grid refinement is performed on the heat source, the rotor region, the radio frequency coil coverage space region and the space region above the bed plate of the transfer incubator, and a fluid boundary layer grid is set.
Wherein, the fluid field model with set boundary conditions is subjected to grid division by adopting an automatic grid or a tetrahedron grid or a mixed grid in Fluent fluid coupling field simulation software, and the local grid is refined, and the fluid field model is mainly aimed at a heat source (heater), a rotor area, a radio frequency coil coverage space area, a space area above a bed plate (bed body) and a fluid boundary layer in the fluid field model. The fluid simulation calculation adopts a finite element analysis method, wherein the finite element method is a numerical calculation method and is an approximate solving mode. The finite element method can calculate a complex physical system, and the method has the merits that the complex physical system can be discretized into a plurality of small units, and after each unit is discretized into a small enough unit, a single unit can be described by a simple primary or secondary function and the like, so that the simple mathematical description of the complex physical system is realized. Generally, the smaller the grid division is, the higher the calculation accuracy is theoretically, but the longer the calculation time is, so for the key areas (heat source, rotor area, radio frequency coil coverage space area and space area above the bed board) of the calculation, we need to refine the grid, and for other non-key areas, the grid size can be enlarged appropriately. The key area is the area of interest for simulation, so the grid needs to be refined to ensure the accuracy of the calculation result.
The invention is exemplified by dividing the whole incubator model (three-dimensional model) into a heating air supply assembly module and an incubator body module according to the circulation path of air fluid; further, for the heating air supply assembly module, the heat source (heater) in the key area and the rotor area (fan assembly) are subjected to local grid refinement; for the incubator body module, carrying out local grid refinement on the space region covered by the radio frequency coil in the key region and the space region above the bed plate; for the fluid boundary layer, an encryption meshing arrangement is employed.
The fluid boundary layer refers to a special flow field formed near the solid surface due to the viscous effect. The boundary layer grid process is employed because the fluid velocity near the wall is reduced by considering the fluid near-wall effect.
In some embodiments, the mesh is an automatic mesh or a tetrahedral mesh or a hybrid mesh.
In some embodiments, the solution settings include solution method settings, solution control, residual settings, initialization settings, run calculation settings, and data save settings.
The method mainly comprises the steps of solving method setting, solution control, residual error setting, initialization setting, operation calculation setting and data storage setting.
In some embodiments, after generating the simulation result, the method further includes:
and adopting the Fluent fluid coupling field simulation software to carry out visualization processing on the simulation result, verifying the simulation result and generating a verification report.
After the simulation result is generated, fluid temperature and speed multi-physical field coupling simulation calculation results of the box body are subjected to visualization processing by adopting Fluent software, namely, temperature and speed distribution calculation results in the transfer incubator are subjected to post-processing and display, and the post-processing and display comprises a series of operations such as flow field visualization, animation, cloud graphics, vectors and the like. The basic steps of the post-treatment include: 1) Importing calculation results, namely cas files and dat files; 2) Creating a characteristic position and displaying physical distribution; 3) Creating a chart and setting a chart graph; 4) Creating and outputting an animation (if needed); 5) And verifying the calculation result and generating a calculation report. As shown in fig. 5, fig. 5 is a graph showing an overall velocity field profile of a transport incubator according to an embodiment of the present application; as shown in fig. 6, fig. 6 is a rotor area velocity field profile provided by an embodiment of the present application; as shown in fig. 7, fig. 7 is a graph of a rotor region temperature field distribution provided in an embodiment of the present application; as shown in fig. 8, fig. 8 is a distribution diagram of a flow field of a tank according to an embodiment of the present application; as shown in fig. 9, fig. 9 is a solid and air heat transfer diagram provided by an embodiment of the present application; as shown in fig. 10, fig. 10 is a graph of a thermal flow profile of a tank provided in an embodiment of the present application; as shown in fig. 11, fig. 11 is a graph of a local area heat flow profile provided in an embodiment of the present application.
The invention realizes the coupling simulation calculation of the fluid multiple physical fields of the magnetic resonance compatible transfer incubator for the first time, and obtains the real physical field distribution condition in the incubator under the condition of considering the influence of multiple physical factors. The effect is that: 1) The reliability, the accuracy and the development efficiency of the development of the incubator products are improved, and the development cost is reduced; 2) The simulation design of incubator products with similar structures has certain universality and guiding reference significance; 3) Through the mutual inspection of calculation results of different simulation software, the accuracy of the simulation results is ensured, and the simulation error is controlled within 4%; 5) Provides theoretical and technical support for the development of subsequent prototypes.
Compared with the prior common incubator (non-magnetic resonance compatible) technology, the invention has the following beneficial effects: the simulation calculation of the fluid temperature and speed of the magnetic resonance compatible transfer incubator is realized for the first time, the coupling simulation of the temperature and speed of the magnetic resonance compatible transfer incubator is realized, the error of the simulation result is less than 4%, the simulation result of the parameters of the multiple physical fields in the incubator is more similar to the real environment of the infant through the joint simulation of the multiple physical fields, the generation of certain complete risks to the infant due to the larger deviation of the parameters such as the temperature, the air flow speed and the like in the incubator is avoided, and the safety and the accuracy in the process of transferring and magnetic resonance inspection of the infant are improved.
Any combination of the above optional solutions may be adopted to form an optional embodiment of the present application, which is not described herein in detail.
In particular, the present application is not limited by the order of execution of the steps described, and certain steps may be performed in other orders or concurrently without conflict.
As can be seen from the foregoing, according to the method for calculating the fluid multi-physical-field coupling simulation of the magnetic resonance compatible transfer incubator provided by the embodiment of the present application, firstly, three-dimensional modeling is performed on the transfer incubator by using solid works or UG three-dimensional modeling software, and the obtained three-dimensional model is simplified, then, fluid domain extraction is performed on the simplified three-dimensional model by using Space Claim software, a fluid domain model is generated, boundary condition setting is performed on the fluid domain model, then, the motion state of fluid inside the transfer incubator is determined, a corresponding calculation module is selected based on the determined motion state, then, environmental conditions are set in Fluent fluid coupling field simulation software, mesh division is performed on the fluid domain model with the set boundary conditions in Fluent fluid coupling field simulation software with the set environmental conditions, finally, solution setting is performed on the three-dimensional model in Fluent fluid coupling field simulation software, and simulation calculation is performed on the fluid domain model with the mesh division through the calculation module in the fluid coupling field simulation software with the set solution completion, and a simulation result is generated, and the simulation result comprises fluid temperature and speed field distribution data inside the transfer incubator. According to the embodiment of the application, through the joint simulation of multiple physical fields, the simulation result of the parameters of the multiple physical fields in the box body is closer to the real environment where the infant is located, so that certain safety risks to the infant due to the deviation of the physical parameters such as the temperature, the air flow speed and the like in the box body can be avoided, and the safety and the accuracy in the infant transportation and magnetic resonance inspection process are improved.
It should be noted that, for the magnetic resonance compatible transport incubator fluid multiple physical field coupling simulation calculation method described in the present application, those skilled in the art will understand that all or part of the flow of the magnetic resonance compatible transport incubator fluid multiple physical field coupling simulation calculation method described in the embodiments of the present application may be implemented by controlling related hardware through a computer program, where the computer program may be stored in a computer readable storage medium, such as a memory of a computer, and executed by at least one processor in the computer, and the execution process may include the flow of the embodiment of the magnetic resonance compatible transport incubator fluid multiple physical field coupling simulation calculation method. The storage medium may be a magnetic disk, an optical disk, a Read Only Memory (ROM), a random access Memory (RAM, randomAccess Memory), or the like.
The fluid multi-physical field coupling simulation calculation method for the magnetic resonance compatible transfer incubator provided by the embodiment of the application is described in detail above. The principles and embodiments of the present application are described herein with specific examples, the above examples being provided only to assist in understanding the methods of the present application and their core ideas; meanwhile, those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, and the present description should not be construed as limiting the present application in view of the above.
Claims (10)
1. A magnetic resonance compatible transport incubator fluid multi-physical field coupling simulation calculation method, the method comprising:
three-dimensional modeling is carried out on the transfer incubator by utilizing SOLIWORKS or UG three-dimensional modeling software, and simplification processing is carried out on the obtained three-dimensional model;
performing fluid domain extraction on the simplified three-dimensional model by using Space Claim software to generate a fluid domain model, and performing boundary condition setting on the fluid domain model;
determining a motion state of fluid in the transfer incubator, and selecting a corresponding calculation module based on the determined motion state;
setting an environmental condition in Fluent fluid coupling field simulation software, and meshing the fluid domain model with the set boundary condition in the Fluent fluid coupling field simulation software with the set environmental condition;
and carrying out solving setting on the three-dimensional model in the Fluent fluid coupling field simulation software, and carrying out simulation calculation on the fluid domain model with the mesh split in the Fluent fluid coupling field simulation software with the solving setting completed through the calculation module to generate a simulation result, wherein the simulation result comprises fluid temperature and speed field distribution data in the transfer incubator.
2. The method for simulating and calculating the fluid multi-physical-field coupling of the magnetic resonance compatible transfer incubator according to claim 1, wherein when grid segmentation is performed on the fluid domain model with the set boundary conditions in the Fluent fluid-coupling field simulation software with the set environmental conditions, grid refinement is performed on a heat source, a rotor area, a radio frequency coil coverage space area and a space area above a bed plate of the transfer incubator, and a fluid boundary layer grid is set.
3. The method of magnetic resonance compatible transport incubator fluid multi-physical field coupling simulation calculation of claim 1, wherein the motion state comprises laminar flow and turbulent flow, and wherein the determining the motion state of fluid inside the transport incubator comprises:
and determining the motion state of the fluid in the transfer incubator according to a Reynolds number calculation formula, specifically, determining the motion state of the fluid in the transfer incubator as turbulent flow when the Reynolds number is larger than 2300, and determining the motion state of the fluid in the transfer incubator as laminar flow when the Reynolds number is smaller than 2300.
4. The method for simulating and calculating the fluid multiphysics coupling of the magnetic resonance compatible transport incubator according to Claim 1, wherein the fluid domain extraction of the simplified three-dimensional model by using Space class software comprises:
and deleting redundant fillets, long strip surfaces, holes, facets and short edges of the simplified three-dimensional model by using Space Claim software, and filling air domains and thin layers.
5. The method for simulating and calculating the fluid multi-physical field coupling of the magnetic resonance compatible transport incubator according to claim 1, further comprising, after generating the simulation result:
and adopting the Fluent fluid coupling field simulation software to carry out visualization processing on the simulation result, verifying the simulation result and generating a verification report.
6. The method of claim 1, wherein the solution settings include solution method settings, solution control, residual settings, initialization settings, run calculation settings, and data save settings.
7. The method of claim 1, wherein the boundary conditions include free air inlet, air supply, air return, housing, heater and rotor.
8. The method of claim 1, wherein the environmental conditions include ambient temperature, absolute pressure, and relative humidity.
9. The method of claim 1, wherein the environmental conditions further comprise heat convection coefficients of the transfer incubator body and the surrounding environment.
10. The method of magnetic resonance compatible transport incubator fluid multi-physical field coupling simulation calculation of claim 1, wherein the mesh is an automatic mesh or a tetrahedral mesh or a hybrid mesh.
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