[Tapoky]

Hi, all.

I have here such mesh. Help, please, how to set UDF for rotation of gears?

[Isaac Pitti]

Hi Tapoky

I dont know about UDF, but I can recommend you, to use MRF for an steady problem, or to use an Sliding mesh for a transient problem, for more information about this, you can see the fluent user's guide.

[pilakin]

Moving Reference Frame would be indeed perfect for this rather than using dynamic mesh with UDF. If you have the fluent tutorials, there's actually a tutorial for a very similar case, you should check it out. It's called sliding Mesh.

[Tapoky]

Originally Posted by pilakin

Moving Reference Frame would be indeed perfect for this rather than using dynamic mesh with UDF. If you have the fluent tutorials, there's actually a tutorial for a very similar case, you should check it out. It's called sliding Mesh.

Maybe it's good idea, but what about end faces? It's linkage of gears. How I can separate this face by zones in these places?

[ghost82]

I think mrf cannot be applied because you can't create surfaces of revolution to include the gears without intersecting them. I think the only way is to assign a moving boundary to the gears' walls and set up remeshing. I think there is on ansys support a tutorial for a gear pump, just search for it.

[Tapoky]

Originally Posted by ghost82

I think mrf cannot be applied because you can't create surfaces of revolution to include the gears without intersecting them. I think the only way is to assign a moving boundary to the gears' walls and set up remeshing. I think there is on ansys support a tutorial for a gear pump, just search for it.

Thx, I think so. But I don't know how to change udf file of this tutorial for using in 3D mission.

[xiashang8898]

Originally Posted by Tapoky

Hi, all.

I have here such mesh. Help, please, how to set UDF for rotation of gears?

i am allan, have you finished your simulation? and my job is about a helical gear pump, of course 3 dimesion, udf shoud not be the problem when simulating gear pump using CFD software, but the mesh re_meshing. my email is 619313616@qq.com, and i hope we'll have some common things to talk about, and you can join the qq group 337969380 (i built it for that reason)