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ridiculous results with phaseScalarTransport in interFoam

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Old   October 11, 2022, 03:08
Default ridiculous results with phaseScalarTransport in interFoam
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Thomas Shi
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Hi Foamers,
I am really struggling with simulating the contaminant transport in water by using the new function object phaseScalarTransport in interFoam. I have read some threads on this topic in the forum and been trying to modifiy the controlDict in my own case, but the results are quite ridiculous, which is incomprehensible for me.
Here is my codes of phaseScalarTransport function and the results of the simulation in 5s :
Code:
  scalarTransport
  {
    type            phaseScalarTransport;
    libs            ("libsolverFunctionObjects.so");
    enabled         true;
    writeControl    writeTime;
    writeInterval   1;
    rho             rho;
    phase           alpha.water;
    field           s.water;
    diffusion       viscosity;
    alphal          1;
    alphat          1;
    nut             nut;
    resetOnStartUp  no;
   }
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Old   October 12, 2022, 02:31
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Thomas Shi
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Anyone ? Please give me some suggestions.
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Old   October 12, 2022, 05:32
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Tom Fahner
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Hi Thomas,

My first guess would be about the discretisation scheme you use for the convection of the scalar. You will need some stabilization on that term typically. It looks like you now have too little of that and then you can get unbounded results.

Cheers,
Tom
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Old   October 13, 2022, 03:22
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Thomas Shi
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Thank you very much for your reply! I will have a try.
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Old   January 8, 2023, 07:49
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Dylan James
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Quote:
Originally Posted by ThomasLong View Post
Thank you very much for your reply! I will have a try.
Hi Thomas,

I have the same problem at present. Have you solved your problem?
Could you please share your experience?

Thanks in advance!
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Old   January 10, 2023, 09:31
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Originally Posted by dylan_OF View Post
Hi Thomas,

I have the same problem at present. Have you solved your problem?
Could you please share your experience?

Thanks in advance!
I have solved the problem.
The fvOptions should be removed from system/controlDict--functions--sTransport.
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