TAGGED: #fluent-#ansys, ansys-cfd, axial-fan, fan
April 2, 2023 at 9:12 amricardoSubscriber
I am having trouble doing a simulation for the first time using fluent.
I have this small fan that I would like to simulate,
It looks good in space claim
It looks good in meshing
It looks good in setup
But after the solution, somehow the fan moves outside the box
I spend the whole day finding out what went wrong but to no avail.
Hopefully, somebody can pinpoint the error I made
I noticed that there is also an option for rotation in "reference frames" tab. But I define the rotation speed in the fluid tab instead of the reference frame. Not sure what the difference is..
April 3, 2023 at 5:29 pmFederico Alzamora PrevitaliSubscriber
I suggest you double check the rotation-axis origin, currently set as 0,0,0.
April 3, 2023 at 10:04 pmricardoSubscriber
Thank you for pointing that out, Federico,
Weirdly, the tutorials that I watched did not change the rotation-axis origin. So I assumed the rotation axis was already at the object's centre.
I changed the axis according to the SpaceClaim object coordinates and it works now.
However, I still could not rotate the fan in the simulation. In the animation, it does not move.
Do I need to do the rotation in both the boundary condition and cell zone?
April 4, 2023 at 12:28 pmFederico Alzamora PrevitaliSubscriber
I'm glad my first suggestion provided some resolution. About your boundary conditions, yes you should also set that to moving wall. Just make sure that your angular speed is set to 0 rad/s if you're using "Relative to adjacent cell zone" formulation. Otherwise, you can use 40rad/s with "absolute" formulation.
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