Multiblocking strategies for the INS3D incompressible NavierStokes code
Abstract
With the continuing development of bigger and faster supercomputers, computational fluid dynamics (CFD) has become a useful tool for realworld engineering design and analysis. However, the number of grid points necessary to resolve realistic flow fields numerically can easily exceed the memory capacity of available computers. In addition, geometric shapes of flow fields, such as those in the Space Shuttle Main Engine (SSME) power head, may be impossible to fill with continuous grids upon which to obtain numerical solutions to the equations of fluid motion. The solution to this dilemma is simply to decompose the computational domain into subblocks of manageable size. Computer codes that are singleblock by construction can be modified to handle multiple blocks, but adhoc changes in the FORTRAN have to be made for each geometry treated. For engineering design and analysis, what is needed is generalization so that the blocking arrangement can be specified by the user. INS3D is a computer program for the solution of steady, incompressible flow problems. It is used frequently to solve engineering problems in the CFD Branch at Marshall Space Flight Center. INS3D uses an implicit solution algorithm and the concept of artificial compressibility to provide the necessary coupling between the pressure field and the velocity field. The development of generalized multiblock capability in INS3D is described.
 Publication:

In Alabama Univ
 Pub Date:
 October 1990
 Bibcode:
 1990asee.nasa.....G
 Keywords:

 Algorithms;
 Blocking;
 Computational Fluid Dynamics;
 Computational Grids;
 Computer Programs;
 Equations Of Motion;
 Incompressible Flow;
 NavierStokes Equation;
 Decomposition;
 Flow Distribution;
 Fortran;
 Nasa Programs;
 Pressure Distribution;
 Space Shuttle Main Engine;
 Steady Flow;
 University Program;
 Velocity Distribution;
 Fluid Mechanics and Heat Transfer