Wind profile Inlet

Carlo_P · October 10, 2019, 08:45

Hey,
I would perform a simulation of the air around a building.

As inlet I should impose a velocity, which is depending on the height

Do anyone wrote an Inlet file like this?
Do you have any idea where it is possible to find one?
Thanks

Carlo

https://en.wikipedia.org/wiki/Wind_profile_power_law

Krao · October 10, 2019, 09:33

Hi Carlo,

If you want to implement varying velocity at the inlet, use swak4Foam, you can just implement the formula that have been described in the reference link, using groovyBC. I once used varying velocity at the inlet for wind turbine simulation, that required ground effects. In that case I have had implemented groovyBC in such a way that the velocity of air at the inlet increases from zero to free-stream velocity in a parabolic manner.

Krao

lebc · October 10, 2019, 16:54

Hi Carlo, you can also use the atmBoundaryLayer native from OpenFOAM, it will give you an inlet velocity varying with the height following a log law. Check the turbineSiting tutorial, it is used there.

Best Regards,
Luis

October 10, 2019, 08:45	Wind profile Inlet	#1
Carlo_P Senior Member Carlo_P Join Date: May 2019 Location: Italy Posts: 176 Rep Power: 7	Hey, I would perform a simulation of the air around a building. As inlet I should impose a velocity, which is depending on the height Do anyone wrote an Inlet file like this? Do you have any idea where it is possible to find one? Thanks Carlo https://en.wikipedia.org/wiki/Wind_profile_power_law

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October 10, 2019, 09:33		#2
Krao Senior Member Kmeti Rao Join Date: May 2019 Posts: 145 Rep Power: 7	Hi Carlo, If you want to implement varying velocity at the inlet, use swak4Foam, you can just implement the formula that have been described in the reference link, using groovyBC. I once used varying velocity at the inlet for wind turbine simulation, that required ground effects. In that case I have had implemented groovyBC in such a way that the velocity of air at the inlet increases from zero to free-stream velocity in a parabolic manner. Krao

October 10, 2019, 16:54		#3
lebc Member Luis Eduardo Join Date: Jan 2011 Posts: 85 Rep Power: 15	Hi Carlo, you can also use the atmBoundaryLayer native from OpenFOAM, it will give you an inlet velocity varying with the height following a log law. Check the turbineSiting tutorial, it is used there. Best Regards, Luis