收稿日期: 2010-10-11
修回日期: 2010-12-31
网络出版日期: 2011-11-15
基金资助
国家自然科学基金(50376043)和中央高校基本科研业务费专项资金(10CX05011A)资助
A new numerical treatment of specified pressure boundary conditions
Received date: 2010-10-11
Revised date: 2010-12-31
Online published: 2011-11-15
王辉 , 徐明海 . 一种新的定压边界处理方法[J]. 中国科学院大学学报, 2011 , 28(6) : 740 -745 . DOI: 10.7523/j.issn.2095-6134.2011.6.006
According to the extrapolation scheme of boundary pressure in SIMPLE algorithm, the pressure formula of internal node near the boundary is derived with specified pressure boundary. Based on the feature of Neumann boundary for velocity, a new computational formula of boundary velocity is derived. The coupling of velocity and pressure is treated by using the IDEAL algorithm, and the steps in solving the fluid flow and heat transfer problem with specified pressure boundary are illustrated. The new method is compared with the methods used in the literature in solving several typical problems. Results show that the proposed method obviously enhances the accuracy of numerical solution and accelerates the convergence of iteration process.
Key words： specified pressure boundary; pressure equation; IDEAL algorithm
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