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TED in MEMS resonator

Posted 20 giu 2012, 09:41 GMT-4 MEMS & Nanotechnology, MEMS & Piezoelectric Devices, Structural Mechanics Version 4.2a 2 Replies

Ruzbeh
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Hi

I am new to COMSOL. I was trying the Thermoelastic damping in MEMS resonator model [it was done on 3.5 but my version is 4.2a] provided by the comsol. Although I get the similar eigenfrequencies but not getting any Q-factor [shows error] value nor the temperature distribution correctly. How to evaluate the Q factor for TED in COMSOL? Also can some please explain the TED modelling in comsol?

Any help on TED would be appreciated. Thanks
2 Replies Last Post 16 nov 2012, 12:41 GMT-5
Ruzbeh
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Posted: 1 decade ago 21 giu 2012, 08:19 GMT-4
Can someone please help me defining the atttached equation as a heat source (Q) in COMSOL? How do I write it in user defined Q source?
Can someone please help me defining the atttached equation as a heat source (Q) in COMSOL? How do I write it in user defined Q source?

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Ruzbeh
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Posted: 1 decade ago 16 nov 2012, 12:41 GMT-5
Refering to this model www.uk.comsol.com/showroom/gallery/1439/

why in this model strain reference temperature is set to zero? And the thermal strain is assumed as alpha*T
instead of alpha*ΔT. Please explain

ΔT = T - Tref
Refering to this model http://www.uk.comsol.com/showroom/gallery/1439/ why in this model strain reference temperature is set to zero? And the thermal strain is assumed as alpha*T instead of alpha*ΔT. Please explain ΔT = T - Tref

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