Hi Santos,

That's great to hear from you. I think your computational domain will be smaller than mine. (maybe there will be difference for the influence from cylinder and from sphere).

I have other analytical solution for sphere. Please let me know if you need.

Best regards,

Bin

Hi Bin,

I just finished a simulation with 1/40 ratio between sphere radius and channel height, and my Cd value deviates just 3% from Stokes law (in my previous attempts the error was higher for smaller channel height).

What analytical solution you have?

Regards,
Jose Santos

Hi, Santos,

The expression of different analytical solutions for sphere case is in my Vista system. I will email you tonight. Please accept it from Italy :)

Best regards,

Bin

Hi FOAMers,

I'm doing the same things around the cylinder. I previously ran a case with k-Epsilon around 1E+5 < Re < 1E+6 sucessfully.
Now I try to do the same with kOmegaSST model, but the solution is not fine, the forceCoefficients are not steady. Can someone please help me with the boundary conditions for k and omega ?! What about zeroGradient a Inlet for such a case?

Thank You
Marco

I'm not sure,but generally it seems to be a general rule to prescribe inlet values of turbulent quantites.You could guess the value or use the value from experimental results.