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Forum: OpenFOAM Running, Solving & CFD

February 8, 2016, 11:17

Replies: 11

Energy balance in solid using chtMRSF

Views: 2,142

Posted By hcl734

Hi, your suggestions have been pure gold as...

Hi,

your suggestions have been pure gold as they worked out for my case pretty good.
But now I am having another question:
It seems like I am using a significant amount of energy (17 W) when...

Forum: OpenFOAM Running, Solving & CFD

January 28, 2016, 03:10

Replies: 11

Energy balance in solid using chtMRSF

Views: 2,142

Posted By hcl734

1) Number of iterations You are...

1) Number of iterations

You are right, thats what happens after some time.

Solving for solid region SOLID
DICPCG: Solving for h, Initial residual = 9.999899e-07, Final residual =...

Forum: OpenFOAM Running, Solving & CFD

January 27, 2016, 03:15

Replies: 11

Energy balance in solid using chtMRSF

Views: 2,142

Posted By hcl734

I also wanted to check the heat balance in the...

I also wanted to check the heat balance in the fluid.
And to obtain the enthalpy flow difference between IN- and OUTLET I used

energyOutlet
{
type patchExpression;
...

Forum: OpenFOAM Running, Solving & CFD

January 27, 2016, 03:11

Replies: 11

Energy balance in solid using chtMRSF

Views: 2,142

Posted By hcl734

My residuals go down and become constant. For h...

My residuals go down and become constant. For h at 1e-6 but it takes sometime.
I also monitored pressure drop, temperature increase and maximum temperature in fluid and solid which become constant...

Forum: OpenFOAM Running, Solving & CFD

January 27, 2016, 02:58

Replies: 11

Energy balance in solid using chtMRSF

Views: 2,142

Posted By hcl734

Hi Stephan, I am using OF 3.0 now, just to...

Hi Stephan,

I am using OF 3.0 now, just to avoid confusion.

fvSchemes for WATER

ddtSchemes
{

Forum: OpenFOAM Running, Solving & CFD

January 26, 2016, 07:47

Replies: 11

Energy balance in solid using chtMRSF

Views: 2,142

Posted By hcl734

It seems to be a matter of convergence. If I...

It seems to be a matter of convergence.
If I continue the run it becomes constant with a small difference.
Increasing nNonOrthCorrectors in the Solid was also helpful, since more iterations are...

Forum: OpenFOAM Running, Solving & CFD

January 15, 2016, 07:47

Replies: 11

Energy balance in solid using chtMRSF

Views: 2,142

Posted By hcl734

Another thing are the high time step continuity...

Another thing are the high time step continuity errors, which decrease but are still quite high

http://s12.postimg.org/l5kezoi71/Screenshot_from_2016_01_15_13_45_37.png

Could somebody point me...

Forum: OpenFOAM Running, Solving & CFD

January 15, 2016, 07:42

Replies: 11

Energy balance in solid using chtMRSF

Views: 2,142

Posted By hcl734

Energy balance in solid using chtMRSF

Hi all,

I simulate a heat exchanger using chtMultiRegionSimpleFoam and OF 2.4.0.
The results are somewhat realistic but I think there might be a problem with thermal convergence in the SOLID...

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