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Have can I introduce a function in integral form to COMSOL

Posted 15 avr. 2011, 05:51 UTC−4 Fluid & Heat Version 4.1 1 Reply

Mohammad
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Hello,

I've got a interal form of PDE:

u + integral_from_0_to_u_of_{ f(u)du } = 0 , ( 0 <= u <= 1 )
have can I introduce the integral form to COMSOL?

Thanks before,
Mohammad
1 Reply Last Post 17 avr. 2011, 03:46 UTC−4
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 17 avr. 2011, 03:46 UTC−4
Hi

normally yes, if you can define enough Boundary conditions to ensure that the solution unique.

You need a little math tweaking (i.e. see the book of Zimmermann for examples). At least one solution is evident f(u)=-1, there are perhaps other tending to that via polynomial developments too

--
Good luck
Ivar
Hi normally yes, if you can define enough Boundary conditions to ensure that the solution unique. You need a little math tweaking (i.e. see the book of Zimmermann for examples). At least one solution is evident f(u)=-1, there are perhaps other tending to that via polynomial developments too -- Good luck Ivar

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