COMPUTATION OF UNSTEADY FLOWS USING NONMATCHING BLOCKS OF STRUCTURED GRID

Abstract

This article presents application of a finite-volume method for computing unsteady flow problems using nonmatching blocks of structured grid. The discretization is of second order in both space and time, and the solution algorithm is based on the SIMPLE method. Results of computations for three unsteady-flow problems are presented to demonstrate the capabilities of the method: flow around a free cylinder, flow around a cylinder confined by two parallel walls, and flow between co-rotating square cylinders. The emphasis is on accuracy and efficiency of the method, so computations are done on systematically refined grids and using several time steps.