Defining Velocity at the Inlet

ulugbey · March 17, 2021, 08:32

Hi,

I have a geometry in Openfoam and I want to define the velocity at the inlet which is not uniform. You can see the velocity at the inlet in the attached file. In the red region it is 400 m/s, in the blue region it is 0 m/s. Do you know how can I apply such a boundary condition at the inlet?

Best regards

reverseila · March 28, 2021, 12:19

Hi,

If you can separate that patch into two different patches I think you can give each your desired values as fixedValue type.

Another way could be using swak4foam which I'm not quite familiar. with swak you can define your inlet as a groovyBC boundary and after that you will give it a value and a condition. the condition basically defines the region in which the value will be assigned.

In both cases you should somehow separate/differentiate between these two regions whether in your mesh or as a mathematical relation with swak.

(Notice also I'm new to openfoam

.)

https://openfoamwiki.net/index.php/Contrib/groovyBC

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March 28, 2021, 12:19		#2
reverseila Member Ali B. Join Date: Mar 2020 Location: abzrg.github.io Posts: 44 Rep Power: 6	Hi, If you can separate that patch into two different patches I think you can give each your desired values as fixedValue type. Another way could be using swak4foam which I'm not quite familiar. with swak you can define your inlet as a groovyBC boundary and after that you will give it a value and a condition. the condition basically defines the region in which the value will be assigned. In both cases you should somehow separate/differentiate between these two regions whether in your mesh or as a mathematical relation with swak. (Notice also I'm new to openfoam .) https://openfoamwiki.net/index.php/Contrib/groovyBC