cfx: rotating solid domain in stationary fluid domain

acro

I tried to rotate a solid impeller in a stationary fluid domain. What's I am trying to do is that the solid impeller rotates by itself and pushes the surrounding fluid.

The reason I need a solid domain instead of making a cutout from the fluid is that I actually want to do a conjugate heat transfer simulation.

I set the the solid impeller as a rotating domain, and the fluid as a stationary domain. And tried various options for the interface between solid and fluid. But none of them worked. It seems that the rotating solid impeller has no effect on the fluid flow.

Could anybody guide me? Thanks a lot.

eddyjames

抓个图出来，说明你想问的问题。

acro

2# eddyjames

As shown in the picture1, there are two domains. the big one is the fluid domain, and the small one is the solid impeller which is located at the center of the fluid domain.

The fluid domain is stationary and the impeller is rotating by itself. A inlet boundary condition is applied at one side of the fluid domain, and a outlet at the other side.

What I expected from the simulation is that the fluid will be pushed by the rotating impeller to rotate. But the result shows that the fluid flows by the impeller just like the impeller is not rotating at all.

hjli6

You can try to increase the rotating speed of impeller.

acro

4# hjli6

Thanks for suggestion.

As you adviced, I increased the impeller rotation speed by 100 times. But still cannot see the impeller effect on the flow profile.