Propulsion-related flowfields using the preconditioned Navier-Stokes equationsA previous time-derivative preconditioning procedure for solving the Navier-Stokes is extended to the chemical species equations. The scheme is implemented using both the implicit ADI and the explicit Runge-Kutta algorithms. A new definition for time-step is proposed to enable grid-independent convergence. Several examples of both reacting and non-reacting propulsion-related flowfields are considered. In all cases, convergence that is superior to conventional methods is demonstrated. Accuracy is verified using the example of a backward facing step. These results demonstrate that preconditioning can enhance the capability of density-based methods over a wide range of Mach and Reynolds numbers.
Document ID
19920066370
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Venkateswaran, S. (NASA Lewis Research Center Cleveland, OH, United States)
Weiss, J. M. (NASA Lewis Research Center Cleveland, OH, United States)
Merkle, C. L. (Pennsylvania State University University Park, United States)
Choi, Y.-H. (Sverdrup Technology, Inc., Brook Park; NASA, Lewis Research Center Cleveland, OH, United States)