Fluent: Warning: zone of type interior found between different solids!

Milad06 · October 5, 2022, 05:09

Hi,

I am running a steady-state (moving reference frame) Conjugated Heat Transfer (CHT) simulation with many solid parts and fluid regions.

I am using conformal mesh using shared topology.

I have noticed that after bringing my mesh into Fluent, I get a warning:

Warning: zone of type interior found between different solids!

This will adversely affect the solution.

It is suggested to use the following command to solve it:

/mesh/modify-zones/slit-interior-between-diff-solids

My question:

When I have interior between solids, does it mean I do not have heat transfer between those solids?

I appreciate your inputs.

Best,
M

AlexanderZ · October 5, 2022, 18:35

you will have heat transfer, however, temperate may be predicted inaccurate on the cells adjusted to interior

Milad06 · October 7, 2022, 10:43

Thanks for the response.

when I tried to slit the faces, the simulation diverges (temperature divergence).

I am dealing with relatively small parts in certain regions of my model, so I know, my mesh is not good enough in those regions so maybe after the slit, it causes issue. After using the command, I of course check the mesh and get no error, but still get temp divergence.

Any suggestion regarding this issue?

I am thinking to refine my mesh in those regions, or maybe introduce all the parts as "Solid" in named selection so that it creates wall & shadow-wall properly from the beginning.

October 5, 2022, 05:09	Fluent: Warning: zone of type interior found between different solids!	#1
Milad06 New Member Milad MU Join Date: Feb 2013 Posts: 9 Rep Power: 13	Hi, I am running a steady-state (moving reference frame) Conjugated Heat Transfer (CHT) simulation with many solid parts and fluid regions. I am using conformal mesh using shared topology. I have noticed that after bringing my mesh into Fluent, I get a warning: Warning: zone of type interior found between different solids! This will adversely affect the solution. It is suggested to use the following command to solve it: /mesh/modify-zones/slit-interior-between-diff-solids My question: When I have interior between solids, does it mean I do not have heat transfer between those solids? I appreciate your inputs. Best, M

October 5, 2022, 18:35		#2
AlexanderZ Senior Member Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34	you will have heat transfer, however, temperate may be predicted inaccurate on the cells adjusted to interior Milad06 likes this. __________________ best regards ****************************** press LIKE if this message was helpful

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October 7, 2022, 10:43		#3
Milad06 New Member Milad MU Join Date: Feb 2013 Posts: 9 Rep Power: 13	Thanks for the response. when I tried to slit the faces, the simulation diverges (temperature divergence). I am dealing with relatively small parts in certain regions of my model, so I know, my mesh is not good enough in those regions so maybe after the slit, it causes issue. After using the command, I of course check the mesh and get no error, but still get temp divergence. Any suggestion regarding this issue? I am thinking to refine my mesh in those regions, or maybe introduce all the parts as "Solid" in named selection so that it creates wall & shadow-wall properly from the beginning.