[benjamvh]

Hi,

I seem to be having some troubles with my boundary conditions when trying to simulate a 2D hydrofoil beneath a free surface with interFOAM. I think part of the issue is that reflection occurs on the outlet boundary, thus messing up the solution. I get a lift force that oscillates with high frequency between 0.2 and 0.7.

May I please have some suggestions on my boundary conditions?

I'm using openFOAM version4.

p_rgh
Inlet: fixedFluxPressure, value uniform 0;
Outlet: fixedFluxPressure, value uniform 0;
atmosphere: totalPressure, value uniform 0
bottom: symmetryPlane
foil: fixedFluxPressure, value uniform 0;

U
Inlet: fixedValue, value iniform (1.64, 0, 0)
Outlet: outletPhaseMeanVelocity, alpha alpha.water, Umean 1.64, value $internalField
atmosphere: pressureInletOutletVelocity, value uniform (0,0,0)
bottom: symmetryPlane
foil: fixedValue, value uniform (0,0,0)

alpha.water
Inlet: fixedValue, uniform 0
Outlet: variableHeightFlowRate, low 0, high 1, value $internalfield
atmosphere: inletoutlet: inletvalue uniform 0, value uniform 0
bottom: symmetryPlane
foil: zeroGradient