[zoey gao]

I use a DPM surface jet source to spray liquid water onto the wall at a certain flow rate, and open the EWF model on the wall, hoping to obtain the thickness of the wall film after spraying for 30 seconds. The wall surface is not smooth, but has bumps and undulations, used to simulate the road surface of real life. But in the final result, the thickness distribution of the wall film showed a spot like pattern, which obviously does not conform to the actual situation. What is the reason for this? How can I solve it?
The number of mesh on the surface of the jet source is greater than the number of mesh on the wall