关于多场耦合问题的几个概念探讨

Discussion on Some Concepts of Coupling Problem of Multi field in Numerical Simulation

从湍流脉动的高阶关联项以及湍流的雷诺(时均)方程出发,指出了动量场(速度场)、能量场、质量场(组分或浓度场)等相互耦合现象可以在湍流脉动关联项和时均项中同时存在;并提出了脉动耦合和时均耦合的概念;指出了在引入湍流模型即对雷诺时均方程使用湍流统计矩方程进行封闭后,动量、能量及质量(组分或浓度)之间的耦合现象可由时均耦合来描述. 介绍了多相(场)

There are coupling phenomenon which are correlation of momentum,energy and mass transfer in field of flows,heat transfer,mass transfer and combustion.Based on higher order fluctuating correlation of turbulence and Reynolds averaged equations,this paper shows the couplings may be blended in terms of fluctuating correlation of turbulence and flowing averaged variable terms.Concepts of coupling of turbulence fluctuating variable and coupling of flowing averaged variable are also proposed.We point out the coupling phenomenon that is correlation of momentum,energy and mass transfer can be formulated by the coupling of flowing averaged variable with turbulence models or closure statistical moment equations of Reynolds averaged equations.The concept of multi phase coupling and solved methods of coupling problems are also introduced.