Numerical simulation of air flow through a biofilter with heterogeneous porous media

被引：14
|
作者：
Yan, Wei-Wei [1 ,2 ]
Liu, Yang [1 ]
Xu, You-Sheng [1 ,2 ]
Yang, Xiang-Long [1 ]
机构：
[1] Hong Kong Polytech Univ, Dept Mech Engn, Hong Kong, Hong Kong, Peoples R China
[2] Zhejiang Normal Univ, Dept Phys, Jinhua 321004, Zhejiang, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2008年 / 99卷 / 07期
基金：
中国国家自然科学基金;
关键词：
biofilter; porous flow; lattice Boltzmann simulation;
D O I：
10.1016/j.biortech.2007.05.038
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Based on the ideal biofilter model, numerical simulation using lattice Boltzmann method is carried out to investigate the effect of Darcy number and porosity on removal efficiency of low headloss biofilter. The generalized Navier-Stokes model (Brinkman-Forchheimer-extended Darcy model) is applied making several assumptions. It is found that the Darcy number has determinant influence on the removal efficiency, and the effect of porosity on removal efficiency is very weak at lower Darcy numbers but very strong at higher Darcy numbers. It was found there was strong evidence of flow heterogeneity in the biofilter (Chitwood, D.E., Devinny, J.S., Reynolds Jr., F.E., 1999. Evaluation of a two-stage biofilter for treatment of POTW waste air. Environ. Prog. 18, 212-221). In this study we have found the biofilter performance can be improved by adjusting local Darcy number of the porous media in the biofilter. (C) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2156 / 2161
页数：6
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