An Adaptive GRP Scheme For Compressible Fluid Flows

This paper presents a second-order accurate adaptive generalized Riemann problem(GRP) scheme for one and two dimensional compressible fluid flows.The current scheme consists of two independent parts:Mesh redistribution and PDE evolution.The first part is an iterative procedure.In each iteration,mesh points are first redistributed,and then a conservative-interpolation formula is used to calculate the cell-averages and the slopes of the conservative variables on the resulting new mesh.The second part is to evolve the compressible fluid flows on a fixed nonuniform mesh with the Eulerian GRP scheme,which is directly extended to two dimensional arbitrary quadrilateral meshes.Several numerical examples show that the present adaptive GRP scheme does not only improve the resolution as well as accuracy of numerical solutions with a few mesh points,but also reduce possible errors or oscillations effectively.