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How to remove gravity in openfoam

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Old   March 7, 2022, 17:03
Default How to remove gravity in openfoam
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Qingqing Liu
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I tried two methods to remove the gravity in a simulation in chtMultiRegionTwoFluidEulerFoam.

1. delete the 'g' file under constant file
2 set gravity as zero in the 'g' file under constant file.

But both methods cause errors.

Has anyone know how to remove the gravity in openFoam?
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Old   March 8, 2022, 10:56
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Josh Williams
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Setting gravity = 0 should not cause an issue (at least in my experience, although I have never used this solver). Could you share how you done this?
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Old   March 8, 2022, 14:55
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Quote:
Originally Posted by joshwilliams View Post
Setting gravity = 0 should not cause an issue (at least in my experience, although I have never used this solver). Could you share how you done this?
When I set g to (0 0 0), the simulation will not run., but no error was shown.
When I set g to some none-zero value, the simulation will run well.
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Old   March 8, 2022, 15:01
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Hmm, without an error message it is hard to comment. Why not try set to some very small non-zero value (for example, 1.e-10)?
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Old   March 8, 2022, 16:08
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Quote:
Originally Posted by joshwilliams View Post
Hmm, without an error message it is hard to comment. Why not try set to some very small non-zero value (for example, 1.e-10)?
Josh,

Thanks for your reply. Yes, what I am doing now is to set g as a very small value.
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