2D Heat Transfer using CFX with moving a boundary

Tiger_JJ · April 9, 2010, 18:28

Hello,

My geometry is just rectangular 50*20 mm*mm, but the top line is keep moving with velocity of 0.1mm/s.

Initial Temperature is fixed at 300k and the bottom temperature is always 300k. No heat transfer out of the left line and the right line

After every second, the top line moved down, and the new temperature on the top line is changed by (Height of the most top grid)/(Height of themost top grid after moving)*300K. And all the grid size changed after this.

heat transfer coefficient is 1.9e-6 mm*mm/s/K

I am a totally newer of CFX. But I figured out how to create the geometry and the mesh by workbench. Please tell me how to input the moving boundary and where to apply the conduction coefficient?

A lot lot of Thanks!!!

ghorrocks · April 10, 2010, 07:34

Moving mesh is covered by several tutorial examples. They are the best place to start. Likewise for temperature boundary conditions, all covered in the tutorials.

Tiger_JJ · April 10, 2010, 16:22

Where are those tutorials?

Would be better if it is one for beginners!

Thanks a lot!!

ghorrocks · April 11, 2010, 07:57

There are a few dozen tutorials which come with CFX, have a look in the documentation. There are a heap more available on the CFX Community on the ANSYS website. Both these sources have plenty of beginner level tutorials.

And there is lots more available but unpublished - you have to ask CFX support for these. These are best left until you are more advanced and have a specific type of simulation in mind, so you can ask for an example of what you intend to do.

April 9, 2010, 18:28	2D Heat Transfer using CFX with moving a boundary	#1
Tiger_JJ New Member Mona Join Date: Apr 2010 Posts: 4 Rep Power: 16	Hello, My geometry is just rectangular 5020 mmmm, but the top line is keep moving with velocity of 0.1mm/s. Initial Temperature is fixed at 300k and the bottom temperature is always 300k. No heat transfer out of the left line and the right line After every second, the top line moved down, and the new temperature on the top line is changed by (Height of the most top grid)/(Height of themost top grid after moving)300K. And all the grid size changed after this. heat transfer coefficient is 1.9e-6 mmmm/s/K I am a totally newer of CFX. But I figured out how to create the geometry and the mesh by workbench. Please tell me how to input the moving boundary and where to apply the conduction coefficient? A lot lot of Thanks!!!

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April 10, 2010, 07:34		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,850 Rep Power: 144	Moving mesh is covered by several tutorial examples. They are the best place to start. Likewise for temperature boundary conditions, all covered in the tutorials.

April 10, 2010, 16:22		#3
Tiger_JJ New Member Mona Join Date: Apr 2010 Posts: 4 Rep Power: 16	Where are those tutorials? Would be better if it is one for beginners! Thanks a lot!!

April 11, 2010, 07:57		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,850 Rep Power: 144	There are a few dozen tutorials which come with CFX, have a look in the documentation. There are a heap more available on the CFX Community on the ANSYS website. Both these sources have plenty of beginner level tutorials. And there is lots more available but unpublished - you have to ask CFX support for these. These are best left until you are more advanced and have a specific type of simulation in mind, so you can ask for an example of what you intend to do.