Numerical Simulation of Flow Field for Push-pull Ventilation System in Industrial Processes

摘要

A three dimensional Computation Fluid Dynamics (CFD) simulation is performed for prediction of flow field for the push-pull ventilation system (PPVS) in industrial processes. The governing gas flow equations, along with the three-dimensional Stand κ-ε Model (KEM), are solved using the finite volume method and the SIMPLE pressure-velocity coupling algorithm in a coordinate system. In order to examine the control capability of the fluid flow to the pollutant from the open surface, the effect of three key geometrical dimensions including the push inlet height, push inlet angle and exhaust height on the flow field are described. It is observed that the batter flow fields associated with the capture efficiency are obtained when the configuration at the condition of decreased push inlet height, decreased inlet angle and increased exhaust height. In addition, the comparisons of velocity profiles between numerical and experimental results are also involved.