On the method of pseudo compressibility for numerically solving incompressible flowsPseudo compressibility is used for numerically solving incompressible flows to achieve computational efficiency. The use of pseudo compressibility results in a system of hyperbolic-type equations of motion that introduce waves of finite speed. The interactions of the wave propagation and the vorticity spreading are analyzed. A criterion governing the dependence of the pseudo compressiblity on the Reynolds number and the characteristic length of the flow geometry is obtained that allows for a proper convergence. It is demonstrated that the solution does tend to the incompressible limit. External and internal viscous flow test problems are presented to verify the theory.
Document ID
19840037102
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chang, J. L. C. (Rockwell International Corp. Rocketdyne Div., Canoga Park, CA, United States)
Kwak, D. (NASA Ames Research Center Moffett Field, CA, United States)