Help to find a 3D varying velocity inlet boundary condition

vianjvr · April 12, 2021, 00:00

Hi, I am brand new to cfd, and have been working on a fairly tricky problem.

I am investigating a the ground effects on a freely oscillating cylinder in 3D, I have everything perfect, I just need help with 1 thing:

In my problem there is a varying inlet velocity, I have been searching for so so long to find a boundary condition for it but I cant seem to find anything that I could use.

The best one I have been able to find is the atmBoundaryLayer , but this one is only for 2D, does anyone know if I can somehow alter it to make it work for 3D, or does anyone know a condition that would work for it?

PenPencil · April 17, 2021, 20:41

I'm not entirely sure if you're talking about OpenFOAM, but I have heard of groovyBC (https://openfoamwiki.net/index.php/Contrib/groovyBC). Hope that helps.

scottmontes1 · April 27, 2021, 10:10

I am not sure that's possible but you may try looking carefully through the guide: https://www.openfoam.com/documentati...daryLayer.html

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April 12, 2021, 00:00	Help to find a 3D varying velocity inlet boundary condition	#1
vianjvr New Member Vian Janse van Rensburg Join Date: Apr 2021 Posts: 1 Rep Power: 0	Hi, I am brand new to cfd, and have been working on a fairly tricky problem. I am investigating a the ground effects on a freely oscillating cylinder in 3D, I have everything perfect, I just need help with 1 thing: In my problem there is a varying inlet velocity, I have been searching for so so long to find a boundary condition for it but I cant seem to find anything that I could use. The best one I have been able to find is the atmBoundaryLayer , but this one is only for 2D, does anyone know if I can somehow alter it to make it work for 3D, or does anyone know a condition that would work for it?

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April 17, 2021, 20:41		#2
PenPencil New Member Icaro A. Carvalho Join Date: Dec 2020 Posts: 24 Rep Power: 5	I'm not entirely sure if you're talking about OpenFOAM, but I have heard of groovyBC (https://openfoamwiki.net/index.php/Contrib/groovyBC). Hope that helps.

April 27, 2021, 10:10		#3
scottmontes1 New Member scott montes Join Date: Apr 2021 Posts: 1 Rep Power: 0	I am not sure that's possible but you may try looking carefully through the guide: https://www.openfoam.com/documentati...daryLayer.html customwritingz.net