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sonicFoam vs rhoCentralFoam forwardStep tutorial

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Old   March 10, 2015, 14:59
Default sonicFoam vs rhoCentralFoam forwardStep tutorial
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Hassan Kassem
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Hello,

I run the forwardStep tutorial case for rhoCentralFoam and sonicFoam
till 10s. I am using the same mesh from the rhoCentralFoam tutorial and the same boundary conditions as well. The only different is the system folder which was copied from the tutorial of forwardStep of each solver.

Can anyone explain the attached results (Mach number) or it is a bug? BTW I run the original tutorials and I get similar results.

I am using OpenFOAM2.3.x using the latest update which rhoCentralFoam BCs were updated (3rd March 2015).
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File Type: jpg Mach10.jpg (23.4 KB, 241 views)
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Old   March 12, 2015, 09:21
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Matthias Neben
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Hello hk318i,

the following paper compares these two solvers and maybe gives an explanation of your results

http://www.google.de/url?sa=t&rct=j&...87920726,d.ZWU
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Old   March 12, 2015, 12:15
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Hassan Kassem
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Quote:
Originally Posted by mneben View Post
Hello hk318i,

the following paper compares these two solvers and maybe gives an explanation of your results

http://www.google.de/url?sa=t&rct=j&...87920726,d.ZWU
Thank you for your response. Despite the differences between the two solvers, such big difference in results is not expected. It looks like if the sonicFoam case has higher back pressure than rhoCentralFoam. I checked the transient results which show that the sonicFoam predicted similar shock pattern at much earlier stage of the simulations time.
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