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Modelling of Piezoelectric Effect

Posted 09.11.2009, 15:37 GMT-5 3 Replies

Bhargavaram Pachala
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Can anybody give me a suggestion how to inject a pressure source on my Piezo solid? So the wave have to pass through the Piezo solid and produces a electric output from my Piezo solid.
3 Replies Last Post 14.11.2009, 10:00 GMT-5
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 2 decades ago 10.11.2009, 01:45 GMT-5
Hi

what about considering the Load BC (boundary Condition case) mostly it is expressed as pressure or a pressure over a depth (in 2D), check the units, as a force applied to a surface results ina pressure.

hope it helps
Ivar
Hi what about considering the Load BC (boundary Condition case) mostly it is expressed as pressure or a pressure over a depth (in 2D), check the units, as a force applied to a surface results ina pressure. hope it helps Ivar
Bhargavaram Pachala
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Posted: 2 decades ago 10.11.2009, 17:04 GMT-5
Thanks and appreciated for you suggestion. But in my modelling I should use a pressure wave that have to penetrate in to my Piezo Solid. Do I have to use pressure acoustics mode or PDE wave equation mode.

Thanks man
Thanks and appreciated for you suggestion. But in my modelling I should use a pressure wave that have to penetrate in to my Piezo Solid. Do I have to use pressure acoustics mode or PDE wave equation mode. Thanks man
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 2 decades ago 14.11.2009, 10:00 GMT-5
Hi

OK if you need "p" as dependent variable, I beleive they are rather similar, one is build on the other no?
[g]=>[c]=>[aco ~= acpr]
it depends on the variables you already have and the extra pre-defined physics you might find handy in a [acpr] w.r.t an [aco].
Probably the [acpr] is the most advanced, I expect (but I'm not 100% sure in V3.5a would have to look it up in detail) that its independent if you fetch it from the Accoustic, Structural or MEMS module.

Good luck
Ivar
Hi OK if you need "p" as dependent variable, I beleive they are rather similar, one is build on the other no? [g]=>[c]=>[aco ~= acpr] it depends on the variables you already have and the extra pre-defined physics you might find handy in a [acpr] w.r.t an [aco]. Probably the [acpr] is the most advanced, I expect (but I'm not 100% sure in V3.5a would have to look it up in detail) that its independent if you fetch it from the Accoustic, Structural or MEMS module. Good luck Ivar

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