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simulate a pointwise given streamfunction

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Old   March 16, 2018, 08:23
Default simulate a pointwise given streamfunction
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Hello Foamers,
I am new to OpenFoam and I am curently working on my Bachelorthesis.
I have started with the tutorial of Jòsef Nagy but now I reached a point where I would need your help.
My given task is to simulate a pointwise given streamfunction.
\Psi(x,y,t) = y³/6 + y²/2 * A(x,t) ...
A(x,t) = Ac(x) + ε² * b(x) * c(t)

Ac(x) and b(x) are pointwise given.

I dont know how to implement this problem into OpenFoam as the streamfunction usually is the result not the starting point.

I really hope you can help me with my porblem. Just Ideas of how to start would be greatly appreciated.
Many thanks in advantage,
Gerolf
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