-湍流模型及其在FLUENT软件中的应用

由于流体湍流运动机理和规律的复杂性,目前尚未找到对各种流动情况都十分有效的模型。不过,工程上应用最广泛的是-两方程模型。应用-两方程模型通过对某管道湍流稳态的模拟并与理论分析比较,以及对某空气管道非稳态的流固耦合问题进行数值模拟,结果证明-湍流模型对于内部的稳态或非稳态的充分发展湍流都很适用,再结合在壁面附近区域采用有效的壁面函数法,可以得到令人满意的结果。

k-eTurbulent Model and its Application to the FLUENT

No turbulence model is currently available that is valid for all types of flows due to the complexity of the mechanics of the fluid tur-bulent flow.But two-equation model is applied most widely in engineering.This article mainly simulates the steady turbulent flow of the water pipeline and compares the results to theory,and also the unsteady flow of the air pipeline both by use of model;we can conclude that model is very effective for interior flow when turbulent flow is fully developed.Moreover,satisfying results can be obtained by ad-opting the appropriate wall function method near the wall region.