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Lift- and drag coefficient on rotating cylinder in a uniform stream
Posted Apr 21, 2014, 5:20 a.m. EDT Fluid & Heat, Computational Fluid Dynamics (CFD) Version 4.3b, Version 4.4 1 Reply
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I'm trying to plot the lift and drag force on a rotating cylinder in a uniform stream (2D) for low Re=100. I've been successfull with calculating/plot the coefficient for the non-rotating cylinder which is well in order with literature.
For the non-rotating cylinder I've used the non-slip boundary condition on the cylinder and the expression: -reacf(v)*2/(spf.rho*U_mean^2*d) for the lift coefficient. Where d is the cylinder diameter and U_mean is the free stream velocity.
Now, when I set the boundary to "sliding wall" and set a rotation velocity the calculated lift force C_L=-reacf(v)*2/(spf.rho*U_mean^2*d)=0. Why is that?
EDIT: I've attached the comsol-file
Thank you /Erik
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Hello Erik Stenberg
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i am also facing the same problem. if u have got the solution then please help me out..
thanking you
susobhan