A depth filtration model of straining within the void networks of stainless steel filters
A depth filtration model of straining within the void networks of stainless steel filters
复制标题
不锈钢过滤器空隙网络内过滤的深度过滤模型
DOI：
10.1002/aic.11925
复制
发表时间：
2009
期刊：
影响因子：
3.7
通讯作者：
A. G. Matthews
中科院分区：
文献类型：
--
作者：
J. C. Price;G. Matthews;K. Quinlan;J. Sexton;A. G. Matthews
基于三维空隙网络模型 Pore-Cor，开发了深度过滤模型。通过八维玻尔兹曼退火变形虫单纯形，将空隙网络的几何形状拟合到通过水银孔隙率测定法测量的不锈钢烧结过滤器的孔隙率和渗滤特性。计算通过网络的优先和关键流路径。来自实验尺寸分布的颗粒沿着这些偏流路径供给，并且当发生应变时，重新计算流动路径。我们表明，该模型有效地再现了通过单程测试测量的实验过滤效率作为压降的函数。我们还对当前过滤效率的测量提出了批评，建议使用新的“α效率”而不是标准的β效率。该模型目前正在接受孔隙测定法和孔隙率数据，从而避免使用汞。
A depth filtration model has been developed, based on the three-dimensional void network model Pore-Cor. The geometry of the void network is fitted, by means of an eight-dimensional Boltzmann annealed amoeboid simplex, to the porosity and percolation characteristics of stainless steel sintered filters measured by mercury porosimetry. Preferential and critical flow paths through the network are calculated. Particles from an experimental size distribution are fed along these flow-biased paths, and when straining occurs, the flow paths are re-calculated. We show that the model usefully reproduces experimental filtration efficiencies as a function of pressure drop, measured by single pass tests. We also offer a critique of current measurements of filtration efficiency, suggesting the use of a new "alpha efficiency" rather than the standard beta efficiency. The model is currently being adapted to accept porometry as well as porosimetry data, hence avoiding the use of mercury.