[enthusiast]

I am setting up the case for dispersion of one gas into another, for the no wind (that is 0 m/s), I am getting some acceptable simulation results.

So basically I am using Open Foam version 8 and I am trying to simulate the case where in H2 gas disperses into air.
I am using rhoReacingBuoyantFoam with no reaction and no combustion for this case.

If I want to simulate the case with certain winds speed should I allocate interfield of U with the desirable wind speed or should I create a separate inlet in my domain and specify the wind speed at this patch, then wait for this simulation and then let the H2 through another inlet. (for this case should i give internalfield in U)

Presently my case is a 2D simulation with only inlet which is dischaging hydrogen into the air present in the large domain.