water level inlt boundary condition

trapan13 · May 17, 2018, 08:29

Hi everyone,

I am using OpenFoam for my internship and I need to modelise the flow in a spillway.
In the upstream part of my spillway I have a tank of water, so I would like to fix a water level for boundary condition and not a velocity. Because in reality I don't know the velocity but the water level is known.

Does someone know How is it possible to put a water level for boundary condition?

I am using the solver InterFoam, I attach to this post a picture to show you the study.

Thank you for your help,

Lou

http://forums.futura-sciences.com/at...jet-schema.png

Jeneas · May 18, 2018, 09:31

Use setFieldsDict i think.

trapan13 · May 22, 2018, 02:36

Quote:

Originally Posted by Jeneas

Use setFieldsDict i think.

Thank you but I think that the setFieldsDict is used to fix an initial condition not an upstream condition for the water level

Jeneas · May 22, 2018, 09:16

Yes, I didn't understand your subject.
It seems complicated to me.
The only way i think is to use a flow inlet to balance your water level.
You can find the flow rate to use in inlet by creating a first simulation where you use the setFieldsDict and you see the flow rate in outlet.
I hope it helps you.
Sorry for my bad english and have a good day

May 17, 2018, 08:29	water level inlt boundary condition	#1
trapan13 New Member Join Date: Apr 2018 Posts: 15 Rep Power: 7	Hi everyone, I am using OpenFoam for my internship and I need to modelise the flow in a spillway. In the upstream part of my spillway I have a tank of water, so I would like to fix a water level for boundary condition and not a velocity. Because in reality I don't know the velocity but the water level is known. Does someone know How is it possible to put a water level for boundary condition? I am using the solver InterFoam, I attach to this post a picture to show you the study. Thank you for your help, Lou http://forums.futura-sciences.com/at...jet-schema.png

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May 18, 2018, 09:31		#2
Jeneas New Member Join Date: May 2018 Posts: 14 Rep Power: 7	Use setFieldsDict i think.

May 22, 2018, 09:16		#4
Jeneas New Member Join Date: May 2018 Posts: 14 Rep Power: 7	Yes, I didn't understand your subject. It seems complicated to me. The only way i think is to use a flow inlet to balance your water level. You can find the flow rate to use in inlet by creating a first simulation where you use the setFieldsDict and you see the flow rate in outlet. I hope it helps you. Sorry for my bad english and have a good day