Efficient Numerical Methods for Nonequilibrium Re-Entry Flows
Technical Report,29 Nov 2011,31 Oct 2012
University of Minnesota Minneapolis United States
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We propose a new implicit computational fluid dynamics method for steady-state compressible reacting flows. The concept is to decouple the total mass, momentum, and energy conservation equations from the species mass and internal energy equations, and to solve the two equation sets sequentially. With certain approximations to the implicit system, it is possible to dramatically reduce the cost of the solution with little to no penalty on convergence properties. Importantly, the cost of the decoupled implicit problem scales linearly with the number of species, as opposed to the quadratic scaling for the conventional fully-coupled method. Furthermore, the new approach reduces the memory requirements by a significant factor. The decoupled implicit method shows promise for application to aerothermodynamics problems and reacting flows.
- Fluid Mechanics