Three Dimensional Simulation of Turbulence Flow for Heat Exchanger Head with Complex Geometries
Nie Jianhu，Tao Wenquan，Wang Qiuwang
(Xi'an Jiaotong University,  Xi'an 710049, China)

Abstract: Standard k-e two-equation model was used to simulate the complex fluid flow in a heat exchanger head. A baffle is set ahead of an outlet tube. The domain-extension method was adopted and conjugated computation was conducted. Implementation of wall-function method was proposed for analyzing the step-wise solid boundaries in the fluid region. Computational results show that baffle could enhanceuniformity of the outflow velocity distribution．
Keywords: turbulence flow;wall function method;complex geometries;numerical study