Numerical simulation of compressible, turbulent, twophase flow
Abstract
A computer program for numerically simulating compressible, turbulent, twophase 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 twoequation 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 secondorder implicit upwind differencing of the inviscid terms of the equations and secondorder 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 twophase 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.
 Publication:

AIAA, 18th Fluid Dynamics and Plasmadynamics and Lasers Conference
 Pub Date:
 July 1985
 Bibcode:
 1985fdpd.confR....C
 Keywords:

 Compressible Flow;
 Computational Fluid Dynamics;
 Computerized Simulation;
 Turbulent Boundary Layer;
 Turbulent Flow;
 Two Phase Flow;
 Cartesian Coordinates;
 Cosmic Dust;
 Earth Surface;
 NavierStokes Equation;
 Nozzle Flow;
 Rocket Nozzles;
 Shock Waves;
 Fluid Mechanics and Heat Transfer