A high-order upwind control-volume method based on integrated RBFs for fluid-flow problems

Abstract

This paper is concerned with the development of a high-order upwind conservative discretization method for the simulation of flows of a Newtonian fluid in two dimensions. The fluid-flow domain is discretized using a Cartesian grid from which non-overlapping rectangular control volumes are formed. Line integrals arising from the integration of the diffusion and convection terms over control volumes are evaluated using the middle-point rule. One-dimensional integrated radial basis function schemes using the multiquadric basis function are employed to represent the variations of the field variables along the grid lines. The convection term is effectively treated using an upwind scheme with the deferred-correction strategy. Several highly non-linear test problems governed by the Burgers and the Navier–Stokes equations are simulated, which show that the proposed technique is stable, accurate and converges well.