Car Wind Tunnel

dear all,

we simulate a wind tunnel and we have trouble “calm” the air-flow behind the car-body.
The actual flow of water vapor behind the car should be still recognized as lines - not a total mish-mash.
Does anyone have an idea with which settings we can achieve this? We’ve tried almost everything in TFD.

thank you

Try adding a plane with force at the back or increasing the wind speed.