Create moving mesh without simulating (CFX)

spatialtime · July 19, 2010, 06:12

Is it possible to let CFX calculate a moving mesh (pre-defined mesh deformation: wall boundary layer moving), without doing the time consuming simulation. I want to do this predictions, so I dont get negative volumes or bad mesh during my calculation, so I have to totally redo it. It would be great if there is a trick to just get the mesh for every transient timestep without the equations solved. So in CFX post I just can see the mesh for every time step without of course the velocity field or other parameters that have to be solved. Note: its just mesh deformation, without FSI.

Hope to hear you, even if its an idea. Thanks

NickFL · July 19, 2010, 16:38

spatialtime-

Yes, you can simply turn off the flow equations by using the expert parameters. Simply add this in your .def file and set each equation to false. This will solve a predefined moving mesh for the specified transient time. Unless your mesh is huge, this will be pretty quick and a good way to debug your model.

Pavelko · July 22, 2010, 10:30

Dear all ,

I was using Fluent and Gambit . Now I must to learn
ANSYS DesignModeler
ANSYS DesignMesh
ANSYS CFX
and I have a problem to get started .

I want to start with a very simple problem : LAMINAR STEADY STATE FLOW IN RIGID TUBE .

Do anyone can give me some tips , or send me some useful tutorials ?

I'll be grateful for any help !
Thanks a lot,
Pavelko .

July 19, 2010, 06:12	Create moving mesh without simulating (CFX)	#1
spatialtime New Member Join Date: Apr 2009 Posts: 12 Rep Power: 17	Is it possible to let CFX calculate a moving mesh (pre-defined mesh deformation: wall boundary layer moving), without doing the time consuming simulation. I want to do this predictions, so I dont get negative volumes or bad mesh during my calculation, so I have to totally redo it. It would be great if there is a trick to just get the mesh for every transient timestep without the equations solved. So in CFX post I just can see the mesh for every time step without of course the velocity field or other parameters that have to be solved. Note: its just mesh deformation, without FSI. Hope to hear you, even if its an idea. Thanks

July 22, 2010, 10:30	Help please !	#3
Pavelko Member Pavelistyj Join Date: Jul 2010 Posts: 42 Rep Power: 15	Dear all , I was using Fluent and Gambit . Now I must to learn ANSYS DesignModeler ANSYS DesignMesh ANSYS CFX and I have a problem to get started . I want to start with a very simple problem : LAMINAR STEADY STATE FLOW IN RIGID TUBE . Do anyone can give me some tips , or send me some useful tutorials ? I'll be grateful for any help ! Thanks a lot, Pavelko .

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July 19, 2010, 16:38		#2
NickFL Senior Member Join Date: Jun 2009 Location: Technische Universität Chemnitz Posts: 107 Rep Power: 16	spatialtime- Yes, you can simply turn off the flow equations by using the expert parameters. Simply add this in your .def file and set each equation to false. This will solve a predefined moving mesh for the specified transient time. Unless your mesh is huge, this will be pretty quick and a good way to debug your model.