Step-wise increase of inflow velocity
 

I tried uniformFixedValue but I think it is not capable of doing what I need.

I would like to start at a low velocity of let's say 1m/s for 10 seconds. After that I want to jump to 2m/s for 10 seconds, then 3m/s and so on.

Any ideas?

https://www.cfd-online.com/Forums/op...ture-wall.html

See the fourth comment.

i think this is a linear interpolation with a slow increase over time. I need a sudden jump at a certain time.

No. It is a jump!

I tested it already on a simple case...

Ah, OK. I might have misread the user guide. Thanks!