Is it a bug Pressure increases with mesh density

mkraposhin · October 24, 2007, 09:42

Hi all!

I found a strange behaviour for turbFoam and rhoTurbFoam - when i increase/decrease mesh size - the pressure range increases/decreases too... I can"t explain this...

PLEASE, HELP ME!

benru · October 24, 2007, 10:06

Matvej, could it concerns with volume averaging ? Did you compare - using ParaView - p(-volumeAveraged-, as ParaView print under the coloure scale of measure) & p(-from cell-) ?

ruben

mkraposhin · October 24, 2007, 10:26

I'm not sure, i'm understanding You...

Here are my steps:

blockMesh . .
rhoTurbFoam . .
paraFoam . .

In ParaView panel "Information" we have entry for:
+ volInterpolate(p) - interpolated values of pressure fieldd in cells
+ cell(p) - discreete values of pressure in cells

So, boundary values of discreete pressure field and interpolated pressure field are the same?

where i'm wrong?

benru · October 25, 2007, 01:54

It seems allright... Boundary should be the same.

October 24, 2007, 09:42	Hi all! I found a strange b	#1
mkraposhin Senior Member Matvey Kraposhin Join Date: Mar 2009 Location: Moscow, Russian Federation Posts: 355 Rep Power: 21	Hi all! I found a strange behaviour for turbFoam and rhoTurbFoam - when i increase/decrease mesh size - the pressure range increases/decreases too... I can"t explain this... PLEASE, HELP ME! __________________ MDPI Fluids (Q2) special issue for OSS software: https://www.mdpi.com/journal/fluids/..._modelling_OSS GitHub: https://github.com/unicfdlab Linkedin: https://linkedin.com/in/matvey-kraposhin-413869163 RG: https://www.researchgate.net/profile/Matvey_Kraposhin

October 24, 2007, 10:06	Matvej, could it concerns with	#2
benru Member Ruben I. Mukhamadeev Join Date: Mar 2009 Location: Obninsk, Kaluga reg., Russian Federation Posts: 69 Rep Power: 17	Matvej, could it concerns with volume averaging ? Did you compare - using ParaView - p(-volumeAveraged-, as ParaView print under the coloure scale of measure) & p(-from cell-) ? ruben

October 24, 2007, 10:26	I'm not sure, i'm understandin	#3
mkraposhin Senior Member Matvey Kraposhin Join Date: Mar 2009 Location: Moscow, Russian Federation Posts: 355 Rep Power: 21	I'm not sure, i'm understanding You... Here are my steps: blockMesh . . rhoTurbFoam . . paraFoam . . In ParaView panel "Information" we have entry for: + volInterpolate(p) - interpolated values of pressure fieldd in cells + cell(p) - discreete values of pressure in cells So, boundary values of discreete pressure field and interpolated pressure field are the same? where i'm wrong? __________________ MDPI Fluids (Q2) special issue for OSS software: https://www.mdpi.com/journal/fluids/..._modelling_OSS GitHub: https://github.com/unicfdlab Linkedin: https://linkedin.com/in/matvey-kraposhin-413869163 RG: https://www.researchgate.net/profile/Matvey_Kraposhin

October 25, 2007, 01:54	It seems allright... Boundary	#4
benru Member Ruben I. Mukhamadeev Join Date: Mar 2009 Location: Obninsk, Kaluga reg., Russian Federation Posts: 69 Rep Power: 17	It seems allright... Boundary should be the same.

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