A question about dynamic mesh

GJ_hit · March 23, 2013, 09:59

I have a question about “rigid dynamic mesh”(sorry ,I don’t know the exactly name ,the meaning is that the grid moved without deformation but entirety)

The problem is :
1 I have a complex model, the flow is outflow.
2 I want to calculate the pitching movement
3 I don’t want to use the smoothing, layering, remeshing command in the Fluent.
4, I want the whole mesh move without deformation
What should I do ?
Does the Fluent with UDF can solve my problem?
Should I do some work on boundary condition?
Can someone give me an example about the 2D airfoil.

Need your help
Thank you

vasava · March 25, 2013, 03:52

In fluent there is 'Cell Zone Condition' where you can select 'Mesh Motion' and input the speed or rotational speed etc.

xiaomi · March 25, 2013, 09:49

however,if i choose the mesh motion method to move the whole mesh, how to set the boundary conditions ?
p.s.if i use the sliding mesh, then the problem can be solved by what you say before

vasava · March 25, 2013, 10:15

Setting up boundary conditions like pressure and velocity have nothing to do with dynamic mesh. You can always setup boundary conditions as you would do in normal case and in addition to that assume that your domain is moving.

March 23, 2013, 09:59	A question about dynamic mesh	#1
GJ_hit New Member Join Date: Mar 2013 Posts: 10 Rep Power: 13	I have a question about “rigid dynamic mesh”(sorry ,I don’t know the exactly name ,the meaning is that the grid moved without deformation but entirety) The problem is : 1 I have a complex model, the flow is outflow. 2 I want to calculate the pitching movement 3 I don’t want to use the smoothing, layering, remeshing command in the Fluent. 4, I want the whole mesh move without deformation What should I do ? Does the Fluent with UDF can solve my problem? Should I do some work on boundary condition? Can someone give me an example about the 2D airfoil. Need your help Thank you

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March 25, 2013, 03:52		#2
vasava Senior Member Paritosh Vasava Join Date: Oct 2012 Location: Lappeenranta, Finland Posts: 732 Rep Power: 23	In fluent there is 'Cell Zone Condition' where you can select 'Mesh Motion' and input the speed or rotational speed etc.

March 25, 2013, 09:49		#3
xiaomi New Member Mi Baigang Join Date: Mar 2013 Posts: 11 Rep Power: 13	however,if i choose the mesh motion method to move the whole mesh, how to set the boundary conditions ? p.s.if i use the sliding mesh, then the problem can be solved by what you say before

March 25, 2013, 10:15		#4
vasava Senior Member Paritosh Vasava Join Date: Oct 2012 Location: Lappeenranta, Finland Posts: 732 Rep Power: 23	Setting up boundary conditions like pressure and velocity have nothing to do with dynamic mesh. You can always setup boundary conditions as you would do in normal case and in addition to that assume that your domain is moving.