Numerical Simulation of the Fluid Traverses the Porous Media by Single Domain Method Based on UDF

摘要

The flow pattern and heat and mass transfer in the porous media and fluid mixing area are widely found in the production and engineering, such as heat pipe, building envelope and insulation materials. Especially the slip effect at the at the interface between the fluid and the porous media has a great impact on the flow and heat and mass transfer. Therefore, the processing of the interface in the mixed area is the focus of many studies. In this paper, the mixed area of fluid and porous media is studied by means of theoretical analysis and numerical simulation. The numerical simulation of the mixed region is carried out by using the single domain method. The purpose of controlling the entire mixing area with a set of control equations is achieved by controlling the source terms which are defined by the user-defined function (UDF) in Fluent. And the accuracy and feasibility of the procedure are verified by comparison with numerical simulation of double domain method. Then, by discussing the influence of different physical parameters on the slip characteristics at the interface between fluid and porous media, the mechanism of velocity slip effect is summarized, which lays the foundation for the study of heat transfer and mass transfer.