A point implicit unstructured grid solver for the Euler and Navier-Stokes equationsAn upwind finite element technique that uses cell centered quantities and implicit and/or explicit time marching has been developed for computing hypersonic laminar viscous flows using adaptive unstructured triangular grids. A structured grid of quadrilaterals is laid out near the body surface. For inviscid flows the method is stable at Courant numbers of over 100,000. A first order basic scheme and a higher order flux corrected transport (FCT) scheme have been implemented. This technique has been applied to the problem of predicting type III and IV shock wave interactions on a cylinder, with a view of simulating the pressure and heating rate augmentation caused by an impinging shock on the leading edge of a cowl lip of an engine inlet. The predictions of wall pressure and heating rates compare very well with experimental data. The flow features are very distinctly captured with a sequence of adaptively generated grids. The adaptive mesh generator and the upwind Navier-Stokes solver are combined in a set of programs called LARCNESS, an acronym for Langley Adaptive Remeshing Code and Navier-Stokes Solver.
Document ID
19880034794
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Thareja, Rajiv R. (PRC Kentron, Inc. Hampton, VA, United States)
Stewart, James R. (PRC Kentron, Inc. Hampton, VA, United States)
Hassan, Obey (PRC Kentron, Inc. Hampton, VA, United States)
Morgan, Ken (PRC Kentron, Inc. Hampton, VA, United States)
Peraire, Jaime (University of Wales Swansea, United States)