Solving for Buoyant forces

Spacehorse · September 8, 2020, 04:51

Hi All,

I'm running a floating objects simulation using interfoam as the solver.

I would like to find out the buoyant forces acting on the object.

on this page: https://www.openfoam.com/documentati...ncy-force.html

it says i can do that by using this:

buoyancy1
{
type buoyancyForce;
selectionMode all;
fields (U);
}

but it doesn't say which file i need to add this to.
If anyone can offer some help that would be great!

Kind regards

Krapf · September 8, 2020, 05:08

Hi Spacehorse

You need to add it to fvOptions.

Kind regards
Krapf

Spacehorse · September 8, 2020, 05:31

Quote:

Originally Posted by Krapf

Hi Spacehorse

You need to add it to fvOptions.

Kind regards
Krapf

Hi Krapf,

thanks for the fast reply.

I don't have an fvOptions in the system folder, there is an fvSchemes and fvSolution. does this mean i should find an fvOptions folder from another case and copy that in?

Kind regards,
Sph

Krapf · September 8, 2020, 06:47

Yes, you can copy a fvOptions file from another case and modify it. IIRC you can place it in the system or the constant folder.

September 8, 2020, 04:51	Solving for Buoyant forces	#1
Spacehorse New Member Join Date: Sep 2020 Posts: 9 Rep Power: 4	Hi All, I'm running a floating objects simulation using interfoam as the solver. I would like to find out the buoyant forces acting on the object. on this page: https://www.openfoam.com/documentati...ncy-force.html it says i can do that by using this: buoyancy1 { type buoyancyForce; selectionMode all; fields (U); } but it doesn't say which file i need to add this to. If anyone can offer some help that would be great! Kind regards

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September 8, 2020, 05:08		#2
Krapf Senior Member Join Date: Oct 2017 Posts: 108 Rep Power: 7	Hi Spacehorse You need to add it to fvOptions. Kind regards Krapf

September 8, 2020, 06:47		#4
Krapf Senior Member Join Date: Oct 2017 Posts: 108 Rep Power: 7	Yes, you can copy a fvOptions file from another case and modify it. IIRC you can place it in the system or the constant folder.