Dynamic mesh for rotational movement in Fluent

aminem · November 7, 2014, 05:52

Hi

Does anyone know how to make simulation of stirred tank with dynamic mesh I have done an MRF simulation and I want to do a comparison with simulation in dynamic mesh

Thanks

ghost82 · November 7, 2014, 06:40

In fluent zone panel deselect frame motion, select mesh motion, setup rotation axis and rotational velocity.
PS: you need interfaces between rotors and stators.

aminem · November 7, 2014, 09:42

Hi
I think you are need a rotors and stators zones only if you make a sliding mesh

ghost82 · November 7, 2014, 09:43

Yes, but also in a mrf simulation you need one or more rotor and one or more stator zones.

aminem · November 7, 2014, 09:47

I mean in dynamic mesh with smoothing and remeshing methods you need a rotors and stators zones ?

ghost82 · November 7, 2014, 09:50

Why dynamic mesh with remeshing?
You have to perform a moving mesh, with the rotors sliding the stators zones.
With moving mesh the rotors (mesh) are really rotating with time.

However if you want to remesh there's no need to have a rotor/stator zone.

aminem · November 7, 2014, 10:00

I have done a simulation with sliding mesh
It's just want to make a test with this type of simulation.
How I can configure my agitator to turn.

ghost82 · November 7, 2014, 10:23

Sorry Amine, I misunderstood.
For dynamic mesh (remesh, etc.) I think you have to write udf for rigid body motion, you can use DEFINE_CG_MOTION, and attach to the impeller walls.

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November 7, 2014, 06:40		#2
ghost82 Senior Member Rick Join Date: Oct 2010 Posts: 1,016 Rep Power: 27	In fluent zone panel deselect frame motion, select mesh motion, setup rotation axis and rotational velocity. PS: you need interfaces between rotors and stators.

November 7, 2014, 09:42		#3
aminem Member amine Join Date: Jan 2014 Location: FRANCE Posts: 84 Rep Power: 12	Hi I think you are need a rotors and stators zones only if you make a sliding mesh

November 7, 2014, 09:43		#4
ghost82 Senior Member Rick Join Date: Oct 2010 Posts: 1,016 Rep Power: 27	Yes, but also in a mrf simulation you need one or more rotor and one or more stator zones.

November 7, 2014, 09:47		#5
aminem Member amine Join Date: Jan 2014 Location: FRANCE Posts: 84 Rep Power: 12	I mean in dynamic mesh with smoothing and remeshing methods you need a rotors and stators zones ?

November 7, 2014, 09:50		#6
ghost82 Senior Member Rick Join Date: Oct 2010 Posts: 1,016 Rep Power: 27	Why dynamic mesh with remeshing? You have to perform a moving mesh, with the rotors sliding the stators zones. With moving mesh the rotors (mesh) are really rotating with time. However if you want to remesh there's no need to have a rotor/stator zone.

November 7, 2014, 10:00		#7
aminem Member amine Join Date: Jan 2014 Location: FRANCE Posts: 84 Rep Power: 12	I have done a simulation with sliding mesh It's just want to make a test with this type of simulation. How I can configure my agitator to turn.

November 7, 2014, 10:23		#8
ghost82 Senior Member Rick Join Date: Oct 2010 Posts: 1,016 Rep Power: 27	Sorry Amine, I misunderstood. For dynamic mesh (remesh, etc.) I think you have to write udf for rigid body motion, you can use DEFINE_CG_MOTION, and attach to the impeller walls.