Ramp up rotating boundary condition
 

Hi All,

I would like to simulate the flow past a rotating cylinder. Now at the surface of the cylinder, we can apply the rotatingWallVelocity boundary condition. However, I want to gradually ramp up the rotating velocity starting from 0 (stationary cylinder) and then with a step of 0.5 of up to 3 rad/s. Can you please let me know how I can set up a ramp-up rotating velocity boundary condition?

Thanks for your help