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Handy for further use...

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In order to reduce entropy from the documentation project thread, I've edited my post and moved the stuff that was just clutter to this blog post, for future reference.
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Not wanting to overdo my time on this soapbox/post, but I think that it would be best to create a project that completes OpenFOAM's existence, rather than creating another clone. Unless, of course, those willing to create the fork actually want to evolve it's infrastructure to a...

A copy of a very helpful reply.

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hi, every
I'am glad to know you ...

Welcome here to communicate with each other to discuss CFD issues...

I'm specifically talking about shocks occuring on an airfoil although I guess the theory would apply generally. I suppose I'm really asking about the reversibility of the Euler equations. I understand that expansion shocks are non-physical but I'm reading that they are a possible solution of the Euler equations. Essentially the Euler equations don't 'know' that the expansion shocks are unphysical and so in some applications an entropy boundary condition is required (which basically rules out expansion...