标题：Numerical Analysis of Gas Flow in Active Longwall Goaf
作者：Xie Jun; Xue Sheng; Cheng Weimin; Wang Gang
作者机构：[Xie Jun; Xue Sheng; Wang Gang] CSIRO Earth Sci & Resource Engn, POB 883, Kenmore, Qld 4069, Australia.; [Cheng Weimin; Wang Gang] Shandong Univ Sci 更多
会议名称：2nd International Conference on Mine Hazards Prevention and Control
会议日期：OCT 15-17, 2010
来源：2010 INTERNATIONAL CONFERENCE ON MINE HAZARDS PREVENTION AND CONTROL
关键词：Numerical analysis; CFD; Gas flow; Porosity; Diffusion; Goaf
摘要：This paper describes the development of a three-dimensional computational fluid dynamic (CFD) model to study the aerodynamics of an active goaf. The aim of this work is to develop a better understanding of gas flow of an active goaf so that an optimized ventilation and drainage system can be developed and implemented. Two 3D CFD models of the goaf were developed. The first model used the standard features of the FLUENT CFD code to simulate the goaf gas flow. The second model was developed by using specially written external functions to model the effect of porosity on the aerodynamics of the goaf. The results show a more realistic continuous distribution of porosity, the suction effect of the goaf holes and their influence on the distribution of pressure, and the concentration of oxygen and carbon dioxide.