how to extend solver compressibleInterFoam to consider ideal gas
Hi, everyone. I am a beginner to use OpenFOAM and my interest is computing the interface between two immiscible compressible gases. It seems that current compressibleInterFoam solver is designed to solve 2 compressible, isothermal immiscible fluids. So if I could extend this solver to consider the interface between two or more ideal gases or real gas? Thanks in advance. I have no idea what should I do at all, please give me some advice.

Hello, Your question sounds very complex (for me).
You are interested in twophase flow of immiscible idealgases, but interFoam family solvers considers for liquids with large density variation. Are you sure that assumptions, made in interFoam solvers family are suitable for your task? If yes, then you can do modifications easily: 1) relate compressibility of each gas to temperature psi = 1/((R/M)*T) 2) rho = psi*p 3) write temperature equation, like this: fvm::ddt(T) + fvm::div(phi,T)  fvm::Sp(divU,T) == (... some expansion sources ...) I solved this case and if you need, then we need to examine your problem step by step 
Thank Kraposhin. I just intend to calculate the interaction of a shock wave with cylindrical Helium gas inhomogeneities, like the experiment conducted by J.*F. Haas and B. Sturtevant (JOURNAL OF FLUID MECHANICS, 1987). A front tracking code was used to perform this simulation in my previous work. And I hope OpenFOAM will work on the same case.
And which solver did you make the mentioned modifications, interFoam or compressibleInterFoam? Could you please give me a detailed description about where and how in the solver should be modified? 
2 Attachment(s)
Have a nice day, jianfeng
I have good news for you  in my archives i found old version of nonisothermal compressibleInterFoam (see attachment). i made test case (based on original) and it behaves well. But! dp/dt works very strange (for me) 
Kraposhin, really thank you for your share. I have compiled the attached code successfully and I will test it with my own case. Hope it work fine.

OF version
Hi,
Is the solver developed for OF1.5 dev.? Thanks 
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