AN UNSTRUCTURED GRID METHOD FOR A PRESSURE-BASED FLOW AND HEAT TRANSFER SOLVER

摘要

An unstructured grid method is developed along with an implicit pressure-based solver to calculate flow and heat transfer problems. The method ir finite volume based and utilizes collocated and cell-centered storage scheme. New second-order discretizations of the convection and diffusion terms are derived and presented for triangular or tetrahedral cells. The pressure damping for promoting stability and the PISO algorithm for resolving the velocity-pressure coupling are extended to the unstructured grid solver A number of two-dimensional flow cases have been calculated to validate the unstructured grid method. The validation cases encompass laminar and turbulent flows with and without heat transfer. At the end, an application to a flow through a branched duct with cooling fins is presented to demonstrate the flexibility of the unstructured grid method for flows with complex geometry. [References: 29]