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非线性湍流模式研究及进展
引用本文:符松.非线性湍流模式研究及进展[J].力学进展,1995,25(3):318-328.
作者姓名:符松
作者单位:清华大学工程力学系
摘    要:现代湍流模式研究已经超出了经典的Boussinesq涡粘性概念和线性的雷诺应力输运范畴,湍流运动过程中的非线性本质已成为模式研究人员所关心的中心问题。其目的在于使湍流模式能更加真实地再现湍流运动的复杂性,提高模式的适用范围,使复杂湍流能够得到合理的模拟,非线性湍流模式在解决复杂湍流运动的计算中已经取得可喜进展,正逐步应用于工程湍流的计算。同时,工程中的湍流问题计算也已走出了简单剪切流动类型及传统的k-ε(及其它形式的)二方程模式框架,二阶矩封闭模式在先进的工程计算中已被用来解决诸如可压缩的空气动力学、发动机气缸及三维复杂几何场内等具有重要应用背景的流动问题,并逐步进入计算流体力学商业软件包。

关 键 词:湍流模式  计算流体力学  复杂流动  数值方法

PROGRESS IN THE STUDY OF NONLINEAR TURBULENCE MODELLING
Fu Song.PROGRESS IN THE STUDY OF NONLINEAR TURBULENCE MODELLING[J].Advances in Mechanics,1995,25(3):318-328.
Authors:Fu Song
Abstract:Contemporary turbulence modelling research has been developed beyond the claasical concepts of Boussinesq eddy-viscosity and linear Reynolds-stress transport,the nonlinear nature of turbulent flolws is now one of the focal points of researcher's concern. The purposc iS to dcvelop the turbulence model which can simulate for modelling studics the complexity of turbulcnce motion more rcalistically, and to increase the adaptivity of the model in applications. Significant progress has heen made over the last few years in the development of the nonlinear turbulence models which include both eddy-viscosity and second- moment closures.Meanwhile, the calculation of cngineering turbulent flows has been carried out beyond the simple-shear type flows and traditional two-equation model approach,second-moment closures have been implemented in advanced com- mercial computer codes to solve problems like compressible aerodynamics,IC cngines and 3-D complex flows with important cngineering background.This article is to pressnt an overview of these developments, emphasis will be laid on the author's modelling experience.
Keywords:turbulence model  computational fluid dynamics  complex flows  
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