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Dissipation density equation in pressure acoustics fluid model

Posted 2015年11月3日 GMT-5 02:14 Acoustics & Vibrations Version 4.4 0 Replies

JeeWon Suh
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Hi guys,

I'm trying to figure out what the equation of dissipation density in pressure acoustics fluid model.

Originally, dissipation function is related to spatial derivative of velocity.

I used the equation I attached here to get the same value from acpr.diss_visc.

But the value from the equation I made was totally different from that of acpr.diss_visc.

Is there anyone who tried to make it before?

Thanks guys.

0 Replies Last Post 2015年11月3日 GMT-5 02:14
COMSOL Moderator

Hello JeeWon Suh

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