Accession Number : AD1040624

Title :   Efficient Numerical Methods for Nonequilibrium Re-Entry Flows

Descriptive Note : Technical Report,29 Nov 2011,31 Oct 2012

Corporate Author : University of Minnesota Minneapolis United States

Personal Author(s) : Candler,Graham V

Full Text :

Report Date : 14 Jan 2014

Pagination or Media Count : 40

Abstract : 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.

Descriptors :   computational fluid dynamics , hypersonic flow , simulations , flow fields , chemical reactions , Numerical methods and procedures , aerothermodynamics

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE