Numerical simulations of non-equilibrium shock layers with efficient implicit schemesCurrent and future calculations of nonequilibrium shock layers require the use of a very large number of equations, due to a multiplicity of chemical species, excited states, and internal energy modes. The computational cost associated with the use of standard implicit methods becomes prohibitive; it is therefore desirable to examine the potential of several methods and determine if any can be projected to be more efficient and accurate for large systems of equations. Here, the performance of several implicit schemes on several simple practical examples of reacting flows is examined. The Euler equations are solved by three different implicit methods, and two methods of coupling between the fluid dynamics and the chemistry are studied. Several cases of stiffness are considered and both 1D and 2D examples are computed.
Document ID
19920064364
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Cambier, Jean-Luc (Eloret Institute, Palo Alto; NASA, Ames Research Center Moffett Field, CA, United States)
Prabhu, Dinesh K. (Eloret Institute Palo Alto, CA, United States)