I'm trying to simulate a rising bubble in a fluid, which is why I tried specifying the velocity magnitude at the air inlet boundary with the following expression:
but it clearly doesn't work. I monitor the velocity at the inlet and it always stays 0.1 m/s. Is there something I'm missing with the flow-time variable ?I have set the time-step size to 5e-05 and the amount of time steps to 10000, so in my head the flow should stop at 2000 timesteps, which it doesn't.
I'm pretty lost and I feel like this should be an easy task for someone more experienced than me. Please tell me if I have to supply you with more information in order to help me. Thanks in advance!