A numerical simulation for mass transfer through the porous membrane of parallel straight channels
A numerical simulation for mass transfer through the porous membrane of parallel straight channels
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平行直通道多孔膜传质的数值模拟
DOI：
10.1016/j.ijheatmasstransfer.2010.01.043
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发表时间：
2010-05-01
影响因子：
5.2
通讯作者：
Lu, Wen-Qiang
中科院分区：
文献类型：
--
作者：
Lu, Junfeng;Lu, Wen-Qiang
本文采用“半通道”模型，对血液透析治疗中两股反向流动的质量交换过程进行了数值模拟。流动被限制在通道内，并被插入的多孔膜分开。在模拟中，两种类型的流动，通道流和超滤流，分别用Navier-Stokes方程和Kedem-Katchalsky（K-K）方程进行物理描述。进一步采用SimpleR算法，确定了通道内的速度场，同时利用浓度方程预测了溶质质量分布。本文采用的实体计算方法对血液透析过程进行了较好的探索，其结果：（1）显示了通道内的流动和溶质分布规律;（2）描述了沿着多孔膜表面的超滤剖面;（3）揭示了存在的纳米级反渗透问题。(C)2010爱思唯尔有限公司保留所有权利。
In this paper, by adopting a "half-channel" model, a mass exchange process (presented in the therapy of hemodialysis) between two opposite running flows is numerically simulated. The flows are confined inside channels and separated by intercalary porous membranes. In the simulation, two types of flows, channel flow and ultra-filtration flow, are physically described, respectively, by Navier-Stokes equations and Kedem-Katchalsky (K-K) equations. By further adopting "SimpleR" algorithm, the velocity fields inside the channels are determined, meanwhile, solute mass distributions are predicted by concentration equation. The solid computation in this paper perfectly explored the process of hemodialysis, its results: (1) displayed the flow and solute distribution patterns inside channels; (2) described the ultra-filtration profiles along the surface of the porous membrane; and (3) disclosed an existent nano-scale reverse osmosis problem. (C) 2010 Elsevier Ltd. All rights reserved.