AN IMPROVED NUMERICAL ALGORITHM FOR SOLUTION OF CONVECTIVE HEAT-TRANSFER PROBLEMS ON NONSTAGGERED GRID SYSTEM

In this paper, a SIMPLE-like algorithm on colocated grid system has be en developed. The ability to suppress the spurious pressure field is a chieved via introducing the pressure difference between adjacent two g rid points into the convection-diffusion finite difference scheme, and the interfacial velocity is obtained by simple linear interpolation. The differencing scheme, discretization of governing equations and sol ution procedure of the algorithm are described in detail. In order to check the validity of the algorithm, several test cases which have ana lytical or benchmark solutions are presented. Good agreements are obta ined between the numerical and the corresponding analytical or benchma rk solutions. The ability of the improved algorithm to suppress the sp urious pressure field is demonstrated via a 3-D example.