Heat Transfer from Solid to Adjacent Solid and then to Adjacent Fluid

dkx209 · July 18, 2013, 04:31

In my case I have a heat surface where I give flux in my BC's, right next to this solid is another solid with different material, say kind of coating. Now what I want to do is to transfer heat to the fluid which is flowing outside the external solid i.e. coating.

I've searched and read that I need to create mesh interfaces, but since I am new to Fluent and all these, first of all I don't know how to separately mesh three objects which are in one assembly, they get meshed together.

When I move to Fluent, after giving heat flux on the inner solid and inlet and outlet velocity on the outer fluid, there is no change in the temperature of the fluid.

Can someone please guide me where I am doing something wrong and how to proceed further? I am using ANSYS Workbench 14.

macfly · July 18, 2013, 10:50

Hi,

What geometry software, what meshing software? If you use design modeler for the geometry, you don't need to do anything special when you create adjacent parts, Fluent will automatically create shadow walls at the internal boundaries. You don't need to create any interface, internal boundaries are just set as walls.

Play with this tutorial, you will understand what are the 'shadow walls' at internal boundaries: http://www.sharcnet.ca/Software/Flue...tg/node390.htm

The keywords in order to find more information on the forum are 'conjugate heat transfer'.

July 18, 2013, 04:31	Heat Transfer from Solid to Adjacent Solid and then to Adjacent Fluid	#1
dkx209 New Member Engineer Join Date: Mar 2013 Posts: 21 Rep Power: 13	In my case I have a heat surface where I give flux in my BC's, right next to this solid is another solid with different material, say kind of coating. Now what I want to do is to transfer heat to the fluid which is flowing outside the external solid i.e. coating. I've searched and read that I need to create mesh interfaces, but since I am new to Fluent and all these, first of all I don't know how to separately mesh three objects which are in one assembly, they get meshed together. When I move to Fluent, after giving heat flux on the inner solid and inlet and outlet velocity on the outer fluid, there is no change in the temperature of the fluid. Can someone please guide me where I am doing something wrong and how to proceed further? I am using ANSYS Workbench 14.

July 18, 2013, 10:50		#2
macfly Senior Member François Grégoire Join Date: Jan 2010 Location: Canada Posts: 392 Rep Power: 17	Hi, What geometry software, what meshing software? If you use design modeler for the geometry, you don't need to do anything special when you create adjacent parts, Fluent will automatically create shadow walls at the internal boundaries. You don't need to create any interface, internal boundaries are just set as walls. Play with this tutorial, you will understand what are the 'shadow walls' at internal boundaries: http://www.sharcnet.ca/Software/Flue...tg/node390.htm The keywords in order to find more information on the forum are 'conjugate heat transfer'.