CFD Utilities Files

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!
!  Aero_Coefs Description:
!
!     For a multiblock surface dataset in PLOT3D form, with vertex-centered
!     pressures or Cps in the function file (nf >= 1), calculate aerodynamic
!     force and moment coefficients.  The assumed right-handed coordinate
!     system is as follows, although it probably doesn't matter what the
!     convention is.
!
!        Ox points downstream; Oy points horizontally; Oz points up.
!
!     SI units are assumed.
!
!     Prompts suffice for the input files.  Providing pressure coefficients
!     rather than surface pressures suppresses prompts for free stream density
!     and velocity and associated divides by half*rhofree*Vfree^2.
!
!     Results go to standard output.
!
!     See also the accompanying LoverD utility for angle attack effects.
!
!  History:
!
!     06/01/2018  D.A.Saunders  Initial implementation, to help Dinesh Prahbu
!                               with RCS thruster calculations.
!     06/04/2018    "     "     Dinesh recommended handling of either pressures
!                               or pressure coefficients, and possibly shear
!                               stresses for viscous forces some day (not now).
!     06/05/2018    "     "     Dinesh found a couple of glitches.
!     02/28/2019     "    "     Surface normals point outward from a convex
!                               right-handed surface, so they are now negated
!                               in order for the x component of the forces to
!                               be positive as one would normally expect.
!
!  Author:  David Saunders, AMA, Inc. at NASA Ames Research Center, CA
!
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