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Dynamic Viscosity of solids - Surrounding Material

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Hello everyone,

I am trying to simulate joule heating & heat transfer in a MEMS device (materials: polysilicon and silicon nitride). I would also like to add air in the surroundings.

When I run the simulation, it gives an error saying that the dynamic viscosity of the materials in missing - however, I could find no clue about these values for the materials I am using. So what is the way around that?

To add air in the surroundings, I am trying to add laminar flow on the boundaries - is that correct, and how to make it consider air as the material? Otherwise are there any other possible ways of doing that?

Would appreciate your help, Thank you


0 Replies Last Post 27 nov. 2022, 07:00 UTC−5
COMSOL Moderator

Hello Josee Mallah

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