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Numerical simulation of compressible, turbulent, two-phase flowA computer program for numerically simulating compressible, turbulent, two-phase flows is described and applied. Special attention is given to flows in which dust is ingested into the turbulent boundary layer behind shock waves moving over the earth's surface. it is assumed that the two phases are interpenetrating continua which are coupled by drag forces and heat transfer. The particle phase is assumed to be dilute, and turbulent effects are modeled by zero- and two-equation eddy viscosity models. An important feature of the turbulence modeling is the treatment of surface boundary conditions which control the ingestion of particles into the boundary layer by turbulent friction and diffusion. The numerical method uses second-order implicit upwind differencing of the inviscid terms of the equations and second-order central differencing of the viscous terms. A diagonal form of the implicit algorithm is used to improve efficiency, and the transformation to a curvilinear coordinate system is accomplished by the finite volume techniques. Applications to a series of representative flows include a two-phase nozzle flow, the steady flow of air over a sand bed, and the air flow behind a normal shock wave in uniform motion over a sand bed. Results of the latter two applications are compared with experimental results.
Document ID
19850059593
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Coakley, t. J.
(NASA Ames Research Center Moffett Field, CA, United States)
Champney, J. M.
(Applied and Theoretical Mechanics, Inc. Oakland, CA, United States)
Date Acquired
August 12, 2013
Publication Date
July 1, 1985
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
AIAA PAPER 85-1666
Accession Number
85A41744
Distribution Limits
Public
Copyright
Other

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