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 : https://apps.dtic.mil/dtic/tr/fulltext/u2/1040624.pdf


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