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Boundaries needing material

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Hi,

(1) I have two domains. I have assigned two different materials to both the domains. Still why do I get error saying that boundaries are needing material assignment ? Please see attachment (screenshot).

(2) If I have a single domain - for example a cube - then still do I need to assign material to
boundaries ?

If I remember correctly, I got error message when I opened the node : "Heat Transfer with surface to surface radiation". Before that I did not get error message, I guess.

I am new to comsol. Any help will be highly appreciated.



1 Reply Last Post 14.05.2021, 21:05 GMT-4
Robert Koslover Certified Consultant

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Posted: 4 years ago 14.05.2021, 21:05 GMT-4
Updated: 4 years ago 14.05.2021, 21:11 GMT-4

I suggest you post your model file (the .mph file) to the forum. This would allow others to take a closer look at the details of the settings you have for the particular boundaries in question. And just to clarify: by saying "two different materials to both the domains," do you really mean that literally, i.e., that each domain has two different materials assigned to it at the same time? Or do you really mean that each domain has its own, individual (single) material, and that there are two domains. The second interpretation would make more sense in most cases, so I am guessing that is what you meant.

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Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
I suggest you post your model file (the .mph file) to the forum. This would allow others to take a closer look at the details of the settings you have for the particular boundaries in question. And just to clarify: by saying "two different materials to both the domains," do you really mean that literally, i.e., that *each* domain has *two different materials* assigned to it at the same time? Or do you really mean that each domain has its own, individual (single) material, and that there are two domains. The second interpretation would make more sense in most cases, so I am guessing that is what you meant.

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