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Unacceptable results using multiphaseEulerFoam

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Old   April 22, 2021, 14:37
Default Unacceptable results using multiphaseEulerFoam
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Mohsen Zarepour
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Hi,
I am working on simulating the pseudo-2d fluidized bed presented by Laverman et al. using the multiphaseEulerFoam solver. Although the time-averaged solid volume fractions are in an acceptable agreement with the literature data, the solid averaged velocity profile does not seem good. I have checked every thing in the settings but I cannot make it better. I appreciate if any experienced guy gives me some hint on this issue.
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Old   April 23, 2021, 13:44
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Is anyone who works with the multiphaseEulerFoam here?
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Old   April 23, 2021, 14:44
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Hi,

Could you please provide a complete and minimal set of information, so that we can reproduce the issue, if possible?

I don't think any useful suggestion can be made based on the current problem description.

Some of the links below may help?
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Old   April 23, 2021, 15:06
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literature.png

my-results.png

file.zip
Thank you for your prompt response. I am working on the simulation of Laverman pseudo-2D fluidized bed. Unfortunately the averaged velocity in y direction is not in an acceptable agreement with the experimental data and the numerical results of the literature. I have attached my results and the literature results. Sorry for the bad format of my results. The averaged velocity unit in my chart is (m/s) while it is (cm/s) in the other plot. The averaged volume fraction is in acceptable agreement with the literature.



I am not sure what is wrong in my settings but I have checked everything and the input values are correct. I appreciate if you can guide me to solve this issue. I have spent a lot of time on it. The run files are also attached.
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Old   April 24, 2021, 01:55
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I would change CarnahanStarling radial model to LunSavage and use a turbulence model for the air phase. Also, is your alphaMinFriction (0.6) from the literature?
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Old   April 25, 2021, 14:19
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Quote:
Originally Posted by dscian View Post
I would change CarnahanStarling radial model to LunSavage and use a turbulence model for the air phase. Also, is your alphaMinFriction (0.6) from the literature?
Thank you ! Yes, it is 0.6 from he literature. I think changing the air flow regime to turbulence did not work. The deviation from the literature result is big. Have you ever validated the results of multiphaseEulerFoam?Do you think if I shoudl switch to version & from the version I am using now, version 8?
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