Temporal discretisation in interFoam
I am writing my Bachelor-Thesis at the moment and need an information about the way time is integrated by the interFoam solver for the basics-chapter of my thesis.
I already spent a lot of time for searching the User- and Programmer-Guides, but all I found are the several possibilities to perform the time integration. What I want to know is: Which of the possibilities is really used by the interFoam solver?
The three possibilities are listed in the Programmer-Guide:
-Euler explicit and
The only thing I found is the possibility to choose the time derivative in the fvSchemes dictionary, but I could not find a place to choose the way time integration is performed.
I think the answer is located within the PISO loop that is called by interFoam, but I searched every source I could think of and did not find the answer to my question.
For interFoam, the momentum equation is discretized in time using the schemes chosen in fvSchemes by either
With respect to the gamma-equation it is solved using explicit Euler if you use the standard interFoam. It can be recompiled to use input from fvSchemes, i.e. implicit time integration; threads can be found on the forum on this topic.
This was exactly what I wanted to know!
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