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multiple integral

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hi to all
i want to calculate the following integral. how can i do it?
plz see the attach file.
in this file h is the variable and not important for me.only it is important for me the calculation of it
thx


3 Replies Last Post 2014年11月6日 GMT-5 14:22
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)

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Posted: 1 decade ago 2010年11月2日 GMT-4 02:28
Hi
If I understand you correctly, you have a 2D model (x,y) with a variable "h" and you need the integral as stated, for me you define over the desired domain a domain integration operator "intop1()*", and then in a Results Derived Value Global evaluation analysis type in (in V4):

intop1(h^2)^2/intop1(h^4)

You can also define a variable H being equal to this equation

Did I understamnd you correct ?

--
Good luck
Ivar
Hi If I understand you correctly, you have a 2D model (x,y) with a variable "h" and you need the integral as stated, for me you define over the desired domain a domain integration operator "intop1()*", and then in a Results Derived Value Global evaluation analysis type in (in V4): intop1(h^2)^2/intop1(h^4) You can also define a variable H being equal to this equation Did I understamnd you correct ? -- Good luck Ivar

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Posted: 1 decade ago 2013年12月9日 GMT-5 10:38
Where can I find help on intop1()?
Where can I find help on intop1()?

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Posted: 1 decade ago 2014年11月6日 GMT-5 14:22
In the documentation of v4.4, see Definitions>Component Couplings>Integration
-DW
In the documentation of v4.4, see Definitions>Component Couplings>Integration -DW

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