Smoke Flow Forcefield settings

Hallo everyone,

I’m trying to replicate this tutorial:

I’m using Blender 2.81 and the Smoke Flow Forcefield dosen’t seem to have the same Effect.
I use the same settings as in the tutorial and the Forcefield effects the paticles but not nearly as much as it is in the video. I turned up the strength and the flow of the Forcefield but that didn’t change the behavior in the way i wanted.

The Forcefield works basicaly but it does not look as crisp as in the tutorial (like at 3:40), it looks more like a fluid not like smoke (like you can see in the screenshot)

Does anybody know what i have to change to get that crisp look?

Thank you for your answers,
Verkon