超高相对分子质量聚乙烯烧结微孔管中流体流动的数值模拟

Numerical Simulation for Fluid Flow in Ultra High Molecular Weight Polyethylene Sintered Pipe

介绍了多孔介质流体动力学中颗粒填充床经典模型Ergun方程。在相同压降、相同孔径条件下,借助有限元分析软件ANSYS,模拟了过滤介质颗粒以立方和六方两种最密堆积结构的水渗透速率,从而分析了超高相对分子质量聚乙烯(PE-UHMW)微孔材料烧结成孔时原料粉体颗粒的堆积模式;最后将已测孔径的PE-UHMW粉末烧结管的渗流速率与模拟实验进行了比较。结果表明,PE-UHMW烧结微孔管中微孔主要是粉体颗粒以六方最密堆积结构形成的。

The classical particle packed bed model equation of Ergun in dynamics of fluids in porous media was introduced. Under the same pressure drop and same aperture condition, using finite element analysis software ANSYS, the simulated permeation rate through particles in cubic and hexagonal packing were compared. Based on simulation and experiments, the powder packing model in powder-sintered PE-UHMW microporous tube was analyzed for various permeation rates and apertures. It showed that the formation of microporous in powder-sintered PE-UHMW pipe was mostly through hexagonal close-packed structure of powder particles.