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Combustion hangs after a while - XiFoam

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Old   January 17, 2022, 23:25
Post Combustion hangs after a while - XiFoam
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Dilshan Casseer
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Hello
I'm trying to simulate H2 combustion with air. domain has two regions- inner with fuel and air, outer without fuel.
I'm using XiFoam with Janaf themo and Sutherland transport model. Momentum transport is LES.


I have used inhomogenous mixture, so that I can set the ft to zero in the outer region, using setfields.

The issue is the combustion hangs after some time. The parameters U, P and T changes with time, but b is frozen in time. Nothing changes.
I have tried adjusting Janaf polinomials, Sutherland Coefficients, using different momentum transport models (LES, RAS) etc, but nothing seem to work. below is an image of b after it hangs (t=0.2 milliseconds). It does not develop beyond this point. I tired different ignition strengths and diameters too. It doesn't seem to make a difference.

Can anyone kindly point me in the direction in what I might be doing wrong.
I have attached the case setup can be found here in zip format.
Attached Images
File Type: jpg b-stalled.jpg (32.7 KB, 3 views)
File Type: jpg model.jpg (42.5 KB, 3 views)
File Type: jpg domain.jpg (20.6 KB, 3 views)
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