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fvDOM validation with analytical results

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Old   April 3, 2019, 08:16
Default fvDOM validation with analytical results
  #1
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Murilo Henrique Moreira
Join Date: Feb 2019
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Dear all,
I am trying to reproduce the work of Amouzandeh et al. He uses analytical results to benchmark both P1 and fvDOM. I am in doubt of how to set up the fvDOM case for infinite parallel black walls separated by a gray media. I have a square domain of 1x1x0.1 with a discretization of 40x40x1. For the frontaAndBack faces I have an empty boundary condition. For top and bottom I have a symmetry plane and as reported on the paper, I am using greyDiffusiveRadiation for the IDefault file as follows:


dimensions [1 0 -3 0 0 0 0];

internalField uniform 0;

boundaryField
{

top
{
type symmetryPlane;
}

bottom
{
type symmetryPlane;
}

right
{
type greyDiffusiveRadiation;
value uniform 400;
}

left
{
type greyDiffusiveRadiation;
value uniform 600;
}

frontAndBack
{
type empty;
}
}

The problem is that my temperature calculated by buoyantSimpleFoam is converging to zero.

Does anybody knows how should I set this up?
For the P1 case all I had to do was to set G as:

dimensions [1 0 -3 0 0 0 0];

internalField uniform 0;

boundaryField
{
top
{
type symmetryPlane;
}

bottom
{
type symmetryPlane;
}

right
{
type MarshakRadiationFixedTemperature;
Trad uniform 400; // radiation temperature field
value uniform 0; // place holder
}

left
{
type MarshakRadiationFixedTemperature;
Trad uniform 600; // radiation temperature field
value uniform 0; // place holder
}

frontAndBack
{
type empty;
}
}

I am felling that I am losing something important
Thank you very much!
All the best,
Murilo
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Old   April 23, 2019, 16:26
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  #2
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Aram Amouzandeh
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Location: Vienna, Vienna, Austria
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Hallo Murilo,


please find attached the case set-ups of the mentioned "validation" cases.




Cheers,
Aram
Attached Files
File Type: gz parallelPlatesFvDOM.gz (6.9 KB, 55 views)
File Type: gz rectMedFvDOM.gz (74.4 KB, 49 views)
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Old   April 23, 2019, 17:07
Default Thenk you very much
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Murilo Henrique Moreira
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Dear Aram,
Thank you very much!
It worked!
All the best,
Murilo
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analytical solution, fvdom, radiation

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