Stagnant Zone

Fidho.im · April 29, 2019, 00:24

Hi everyone,

I did a simulation on Euler-Euler gas-liquid bioreactor and the result seems good. Afterward, i want to find the stagnant zone for liquid phase (the percentage of volume with low velocity per total volume). How can i discover the volume under certain velocity (lower than 10^-3 m/s)?
I would be really glad if there are some suggestions

Thanks

Fidho.im · May 9, 2019, 13:46

Hi

I am still wondering how to find the volume of the stagnant zone and i think it might be possible to do that through expression in CFD-post. What would be a good way to do that in expression? I mean how to write the expression since there is no formula about it
I hope someone can help me with this issue

Regards

ABgabriel13 · January 22, 2024, 08:48

Quote:

Originally Posted by Fidho.im

Hi

I am still wondering how to find the volume of the stagnant zone and i think it might be possible to do that through expression in CFD-post. What would be a good way to do that in expression? I mean how to write the expression since there is no formula about it
I hope someone can help me with this issue

Regards

Hey, were you able to do this post-processing?

North Star · January 24, 2024, 08:10

Hey,
Would setting an iso-clip with your defined max velocity to create a surface, and then using surface integrals --> sum --> mesh --> cell volume to obtain a total volume work? You could then multiply this value with the average volume fraction (within the iso-clip) of your desired phase to obtain an approximate value, but I'm just guessing here.

April 29, 2019, 00:24	Stagnant Zone	#1
Fidho.im New Member Join Date: Feb 2019 Posts: 5 Rep Power: 7	Hi everyone, I did a simulation on Euler-Euler gas-liquid bioreactor and the result seems good. Afterward, i want to find the stagnant zone for liquid phase (the percentage of volume with low velocity per total volume). How can i discover the volume under certain velocity (lower than 10^-3 m/s)? I would be really glad if there are some suggestions Thanks

May 9, 2019, 13:46	Stagnant Zone	#2
Fidho.im New Member Join Date: Feb 2019 Posts: 5 Rep Power: 7	Hi I am still wondering how to find the volume of the stagnant zone and i think it might be possible to do that through expression in CFD-post. What would be a good way to do that in expression? I mean how to write the expression since there is no formula about it I hope someone can help me with this issue Regards

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[Commercial meshers] Mesh conversion problem (fluent3DMeshToFoam)	Aadhavan	OpenFOAM Meshing & Mesh Conversion	2	March 8, 2018 01:47
Possible Bug in pimpleFoam (or createPatch) (or fluent3DMeshToFoam)	cfdonline2mohsen	OpenFOAM	3	October 21, 2013 09:28
[Commercial meshers] fluentMeshToFoam multidomain mesh conversion problem	Attesz	OpenFOAM Meshing & Mesh Conversion	12	May 2, 2013 10:52
Problem in running ICEM grid in Openfoam	Tarak	OpenFOAM	6	September 9, 2011 17:51
Problem in IMPORT of ICEM input file in FLUENT	csvirume	FLUENT	2	September 9, 2009 01:08

January 24, 2024, 08:10		#4
North Star New Member Join Date: Sep 2021 Posts: 7 Rep Power: 4	Hey, Would setting an iso-clip with your defined max velocity to create a surface, and then using surface integrals --> sum --> mesh --> cell volume to obtain a total volume work? You could then multiply this value with the average volume fraction (within the iso-clip) of your desired phase to obtain an approximate value, but I'm just guessing here.