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integral symbol

Posted May 28, 2010, 6:37 a.m. EDT 1 Reply

Bala Kampalli
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hi guys,

I am new to comsol modeling. I want to use the rms velocity in comsol but it has an integral symbol in it like
vrms = sqrt(1/V integral of (vx^2 + vy^2)) how to put it in the comsol expressions because without this vrms in cannot move further.

thanks in advance

bala
1 Reply Last Post May 28, 2010, 8:05 a.m. EDT
Danial Tz
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Posted: 1 decade ago May 28, 2010, 8:05 a.m. EDT
You have to calculate the integral first in "integration coupling variable", depending if it is on the subdomain or elsewhere. Call that integral say int_V and then use it in your expression.
You have to calculate the integral first in "integration coupling variable", depending if it is on the subdomain or elsewhere. Call that integral say int_V and then use it in your expression.

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