How many mesh continuum for 2physic continuums in conjugate heat transfer?two or one?

ooo · February 8, 2012, 14:15

I want to simulate a conjugate heat transfer model.
Consider a Block with a solid continuum which is surrounded by another block which has fluid continuum.
Is there anyone knows the difference between :
a ) having one mesh continuum for each physic continuum.
in comparison to:
b ) having one mesh continuum for both of them.
(the mesh model can be surface remesher and any Volume mesh....)
As you know, Both of "a" and "b" are possible.

willimanili · February 8, 2012, 14:28

You have to use one mesh continuum for both regions. Because you need interfaces with conformal meshs and this can only be created with one mesh continuum. If you use one mesh continuum for each region (two mesh continua) the interface will not have a conformal mesh.

abdul099 · February 18, 2012, 06:23

willimanilli is right. Although it's possible to have a separate mesh continuum for each region (and sometimes necessary), it is not recommended. Better to mesh all regions at at time with one mesh continuum ("per region meshing" unticked).

tH3f0rC3 · May 24, 2012, 07:58

Quote:

Originally Posted by abdul099

willimanilli is right. Although it's possible to have a separate mesh continuum for each region (and sometimes necessary), it is not recommended. Better to mesh all regions at at time with one mesh continuum ("per region meshing" unticked).

Hi,
I have read your answer.

I want to create a mesh with different base size (in bulk but with conformal mesh at the interface).
What do I have to do?

Best Regards,
tH3f0rC3

fshak92 · May 24, 2012, 08:54

Quote:

Originally Posted by tH3f0rC3

Hi,
I have read your answer.

I want to create a mesh with different base size (in bulk but with conformal mesh at the interface).
What do I have to do?

Best Regards,
tH3f0rC3

I'm new to STAR-CCM+ but i think by using 'volumetric control' you can have different mesh size in the places and areas you want.
e.g. making a block in the volume you want to have a finer mesh.
make a new volumetric control and assign the block to this volumetric control.then you will be able to set different mesh sizes...

tH3f0rC3 · May 24, 2012, 08:58

Thanks for your answer.
I will try...

tH3f0rC3 · May 24, 2012, 09:24

I've tried after reading the user manual page 7171 ff.
I'm afraid it doesn't work. The volumetric conrol doesn't seem to have an influence on the mesh creation. The mesh is still uniform.

Maybe you know how to proceed?!

Best regards,
tH3f0rC3

tH3f0rC3 · May 24, 2012, 09:53

Now it works.

You have to define the volume control to the volume where you want to have a finer mesh. I did it the other way round. Than I specified an absolute size greater than the base size of the mesh. Star-CCM+ doesn't like this way :-)

tH3f0rC3 · May 29, 2012, 01:28

sorry, wrong thread

February 8, 2012, 14:15	How many mesh continuum for 2physic continuums in conjugate heat transfer?two or one?	#1
ooo Member Join Date: Feb 2012 Posts: 49 Rep Power: 14	I want to simulate a conjugate heat transfer model. Consider a Block with a solid continuum which is surrounded by another block which has fluid continuum. Is there anyone knows the difference between : a ) having one mesh continuum for each physic continuum. in comparison to: b ) having one mesh continuum for both of them. (the mesh model can be surface remesher and any Volume mesh....) As you know, Both of "a" and "b" are possible.

May 29, 2012, 01:28		#9
tH3f0rC3 Senior Member Join Date: Mar 2011 Posts: 158 Rep Power: 15	sorry, wrong thread Last edited by tH3f0rC3; May 29, 2012 at 03:05.

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February 8, 2012, 14:28		#2
willimanili Member Join Date: Feb 2011 Location: DE-PB Posts: 56 Rep Power: 15	You have to use one mesh continuum for both regions. Because you need interfaces with conformal meshs and this can only be created with one mesh continuum. If you use one mesh continuum for each region (two mesh continua) the interface will not have a conformal mesh.

February 18, 2012, 06:23		#3
abdul099 Senior Member Join Date: Oct 2009 Location: Germany Posts: 636 Rep Power: 21	willimanilli is right. Although it's possible to have a separate mesh continuum for each region (and sometimes necessary), it is not recommended. Better to mesh all regions at at time with one mesh continuum ("per region meshing" unticked).

May 24, 2012, 08:58		#6
tH3f0rC3 Senior Member Join Date: Mar 2011 Posts: 158 Rep Power: 15	Thanks for your answer. I will try...

May 24, 2012, 09:24		#7
tH3f0rC3 Senior Member Join Date: Mar 2011 Posts: 158 Rep Power: 15	I've tried after reading the user manual page 7171 ff. I'm afraid it doesn't work. The volumetric conrol doesn't seem to have an influence on the mesh creation. The mesh is still uniform. Maybe you know how to proceed?! Best regards, tH3f0rC3

May 24, 2012, 09:53		#8
tH3f0rC3 Senior Member Join Date: Mar 2011 Posts: 158 Rep Power: 15	Now it works. You have to define the volume control to the volume where you want to have a finer mesh. I did it the other way round. Than I specified an absolute size greater than the base size of the mesh. Star-CCM+ doesn't like this way :-)