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Thermal Boundary Resistances

Posted Dec 18, 2018, 10:45 a.m. EST Electromagnetic Heating, Semiconductor Devices, Heat Transfer & Phase Change Version 5.4 3 Replies

Alexander Collins
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I'm modelling the thermal characteristics of a thin-film transistor.

In addition to the thermal conductivities of the materials in the stack, I'd like to include some thermal boundary resisistances (in m^2 . K / W, or the inverse as thermal boundary conductance) at the boundaries between certain elements of the device.

What's the best way to implement this?

3 Replies Last Post Dec 19, 2018, 8:36 a.m. EST
Jeff Hiller COMSOL Employee

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Posted: 6 years ago Dec 18, 2018, 5:21 p.m. EST
Updated: 6 years ago Dec 18, 2018, 5:23 p.m. EST

Hi Alexander,

If your license includes the add-on Heat Transfer Module, you have access to thin layer formulations documented in the Heat Transfer Module's User's Guide, version 5.4, starting on page 185. This functionality is not part of the basic Heat Transfer capabilities included with the core COMSOL Multiphyscs. To check if your license includes the optional Heat Transfer Module, inside the software go to File > Licensed and Used Products.

This example illustrates this capability.

Best regards,

Jeff

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Jeff Hiller
Hi Alexander, If your license includes the add-on Heat Transfer Module, you have access to thin layer formulations documented in the Heat Transfer Module's User's Guide, version 5.4, starting on page 185. This functionality is not part of the basic Heat Transfer capabilities included with the core COMSOL Multiphyscs. To check if your license includes the optional Heat Transfer Module, inside the software go to File > Licensed and Used Products. [This example](https://www.comsol.com/model/composite-thermal-barrier-13723) illustrates this capability. Best regards, Jeff
Alexander Collins
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Posted: 6 years ago Dec 19, 2018, 5:07 a.m. EST
Updated: 6 years ago Dec 19, 2018, 6:01 a.m. EST

Hi Jeff,

Ah, I can see that my licence doesn't include the Heat Tranfer Module.

In the 'Heat Transfer in Solid (ht)' physics node that I have there is still a 'Thin Layer' option, how is this different to what is offered in the module?

(I'm guessing that it can only do a 'thermally thick approximation' of a thermal boundary resistance...?)

Best regards,

Alex

Hi Jeff, Ah, I can see that my licence doesn't include the Heat Tranfer Module. In the 'Heat Transfer in Solid (ht)' physics node that I have there is still a 'Thin Layer' option, how is this different to what is offered in the module? (I'm guessing that it can only do a 'thermally thick approximation' of a thermal boundary resistance...?) Best regards, Alex
Jeff Hiller COMSOL Employee

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Posted: 6 years ago Dec 19, 2018, 8:36 a.m. EST

The attached screenshot (from the "Specification Chart" on our website) compares what's in the core package vs the Heat Transfer Module as far as Thin Layers on boundaries.

Contact your COMSOL rep for a trial of the Heat Transfer Module: www.comsol.com/contact.

Jeff

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Jeff Hiller
The attached screenshot (from the "Specification Chart" on our website) compares what's in the core package vs the Heat Transfer Module as far as Thin Layers on boundaries. Contact your COMSOL rep for a trial of the Heat Transfer Module: www.comsol.com/contact. Jeff

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