Extracting nodal forces on boundary in OpenFoam

rocco.bom · November 24, 2023, 04:59

Hello!

I am fairly new to OpenFoam and I'm trying to understand if the following feature exists.
I'd like to extract total forces (resulting from pressure and shear) on the nodes of a chosen boundary at the end of a steady run.
I am already able to directly extract pressures and shears and the normal to the element but I'd like to know if the already integrated (over the relative surface) forces can be extracted somehow.

Thanks in advance for any hint about this.

Best,
Rocco

Yann · November 24, 2023, 05:11

Hello,

In the ESI-OpenCFD branch (openfoam.com), you can use the force function object with the writeFields flag in order to write forces as a scalar field.
https://doc.openfoam.com/2306/tools/...forces/forces/

I don't know if there is an equivalent feature in the foundation branch (openfoam.org).

Regards,
Yann

November 24, 2023, 04:59	Extracting nodal forces on boundary in OpenFoam	#1
rocco.bom New Member Rocco Join Date: Jan 2017 Posts: 6 Rep Power: 9	Hello! I am fairly new to OpenFoam and I'm trying to understand if the following feature exists. I'd like to extract total forces (resulting from pressure and shear) on the nodes of a chosen boundary at the end of a steady run. I am already able to directly extract pressures and shears and the normal to the element but I'd like to know if the already integrated (over the relative surface) forces can be extracted somehow. Thanks in advance for any hint about this. Best, Rocco

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November 24, 2023, 05:11		#2
Yann Senior Member Yann Join Date: Apr 2012 Location: France Posts: 1,236 Rep Power: 29	Hello, In the ESI-OpenCFD branch (openfoam.com), you can use the force function object with the writeFields flag in order to write forces as a scalar field. https://doc.openfoam.com/2306/tools/...forces/forces/ I don't know if there is an equivalent feature in the foundation branch (openfoam.org). Regards, Yann