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Old   October 25, 2018, 09:28
Default hydrodynamic forces
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Johannes Voß
Join Date: May 2018
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Hi Foamers,

I want to calculate the forces on some surfaces for a hydrodynamic case. The available functions "forces" or "forcesCoeff" calculate the forces for the aerodynamic case where turbulences occur.
I tried a simple case: I have a 2D box and at one surface a pressure wave is entering the domain. I calculate the force on the entering surface.The whole case is symmetric so I expect a force which is acting only in the wave direcetion (in my case the x direction).
With the implemented function "force" I get a tangential component in the viscous part which should not occure. Only the pressure force is equal to the theoretic expected one.
I think the tangential force is the result of some turbulences which are considered in "force" but don't play a role in my simulation since I use a laminar case.

My question is, is there a function to calculate the forces without turbulence (I was not able to find one)? Or do I have to change the code to do that.

Thanks in advance

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hydrodynamic forces

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