摘要
填充床是一种常见的化学和生化反应器。由于内部结构的复杂性,填充床的局部流动求解一直是个颇有挑战性的问题。传统的填充床数值模拟是在CFD软件Fluent的平台上,采用非结构化网格求解。采用非结构网格求解存在网格生成困难,网格数目过多以及计算时间长等问题。Chimera网格的应用大大减少了填充床网格的数目及网格生成的难度。PVM分布式并行计算与Chimera网格的结合,使填充床的求解效率得到很大的提高。通过对两种方法在计算使用时间、内存使用量及计算结果的具体比较,阐述了Chimera网格结合PVM分布式并行计算在填充床流动求解中的优势。
Packed bed reactors have been widely used in chemical and bio-chemical processes.However,solving of local flow problems has challenged researchers for a long period,because of the complexity of its inner structure.Simulations of the packed bed are often done using unstructured grids with commercial CFD codes,e.g.Fluent.Nevertheless,unstructured grids require huge number of grid cells and a long computation time,as well as plenty of time for local meshing of the computation domain.The grid cell number of the packed bed can be reduced a lot if Chimera grid is applied.Using PVM-based distributed parallel computation,Chimera grid-based simulation improves significantly the computing efficiency.Comparisons of computing time,memory usage and the simulation results have been made between the two methods and the advantage of the combination of Chimera grid and PVM-based distributed parallel computing in the simulation of packed bed flow has clearly been presented.
出处
《能源研究与信息》
2012年第3期165-170,共6页
Energy Research and Information
