Inviscid Compressible Flow Computations on 3D Unstructured Grids

In this paper, an explicit finite element based numerical procedure is presented for simulatingthree-dimensional inviscid compressible flow problems. the implementation of the first-orderupwind method and a higher-order artificial dissipation technique on unstructured grids, usingtetrahedral elements, is described. both schemes use a multi-stage runge-kutta time-steppingmethod for time integration. the use of an edge-based data structure in the finite elementformulation and its computational merits are also elaborated. furthermore, the performance ofthe two schemes in solving a benchmark problem involving transonic flow about an onera m6wing is compared and detailed solutions are presented.