Ask for Help
Dear All,
I am a university final year student. I am now participating in a project of implementing a paper on Computational Fluid Dynamics for compressible fluid. However, I got a problem of understanding some of the terms in the equations provided in the paper. I have put a part of the paper on the web. The address is: http://ihome.cuhk.edu.hk/~s976337/fluid/gethelp.html In the equations, there are terms with bars on top. And the paper describe these terms as "Base state variables, denoted by overbars, are timeinvariant functions of z, the vertical coordinate." But I cannot understand what is the meaning of it even after discussing with others. Could any one interested in CFD gives me a help? I will be glad if this problem can be solved. Thanks a lot! Billy Leung 
Re: Ask for Help
(1). I think, it is trying to say that, the variable with a bar on the top of it, is not a function of time (in the transient equations). It is (or those are) a function of z.

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