
Accession Number : ADA301994
Title : A FarField NonReflecting Boundary Condition for TwoDimensional Wake Flows.
Descriptive Note : Contract rept.,
Corporate Author : INSTITUTE FOR COMPUTER APPLICATIONS IN SCIENCE AND ENGINEERING HAMPTON VA
Personal Author(s) : Danowitz, Jeffrey S. ; Abarbanel, Saul A. ; Turkel, Eli
PDF Url : ADA301994
Report Date : SEP 1995
Pagination or Media Count : 35
Abstract : Farfield boundary conditions for external flow problems have been developed based upon longwave perturbations of linearized flow equations about a steady state far field solution. The boundary improves convergence to steady state in singlegrid temporal integration schemes using both regulartimestepping and localtimestepping. The farfield boundary may be near the trailing edge of the body which significantly reduces the number of grid points, and therefore the computational time, in the numerical calculation. In addition the solution produced is smoother in the farfield than when using extrapolation conditions. The boundary condition maintains the convergence rate to steady state in schemes utilizing multignd acceleration. (AN)
Descriptors : *WAKE, *TWO DIMENSIONAL FLOW, *VISCOUS FLOW, MATHEMATICAL MODELS, STEADY STATE, TIME DEPENDENCE, GRIDS, COMPUTATIONAL FLUID DYNAMICS, FAR FIELD, COMPRESSIBLE FLOW, FLOW FIELDS, NUMERICAL INTEGRATION, CONVERGENCE, PERTURBATIONS, SUBSONIC FLOW, NAVIER STOKES EQUATIONS, LAMINAR FLOW, INCOMPRESSIBLE FLOW, BOUNDARY LAYER FLOW, TRAILING EDGES, EXTRAPOLATION, SMOOTHING(MATHEMATICS).
Subject Categories : Fluid Mechanics
Numerical Mathematics
Distribution Statement : APPROVED FOR PUBLIC RELEASE