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Error function in geometry

Posted 29 mar 2013, 12:39 GMT-4 Computational Fluid Dynamics (CFD), Geometry Version 4.3 1 Reply

Hooman
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Hello folks,

I wanna to draw "erfc" function as an upper border for my geometry.
Any idea ?

Thank you in advance!
1 Reply Last Post 30 mar 2013, 03:46 GMT-4
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 30 mar 2013, 03:46 GMT-4
Hi

I agree that an integrated "erf" function/operator in COMSOL would be nice (even to use it as initial conditions !) but for some reason it's not in there (YOU HEAR US COMSOL DEVELOPPERS ? perhaps they will notice, I believe I suggested this already a few years ago ;)

I would say, to get around, you can call it in from matlab or make up a small 1D model in COMSOL and solve it since it's an ODE, no ?

But the easiest is probably to use one of the approximations readily available, see Wiki, or Eric Weisstein 's pages or "Abramowitz and Stegun"'s book or any of the others

--
Good luck
Ivar
Hi I agree that an integrated "erf" function/operator in COMSOL would be nice (even to use it as initial conditions !) but for some reason it's not in there (YOU HEAR US COMSOL DEVELOPPERS ? perhaps they will notice, I believe I suggested this already a few years ago ;) I would say, to get around, you can call it in from matlab or make up a small 1D model in COMSOL and solve it since it's an ODE, no ? But the easiest is probably to use one of the approximations readily available, see Wiki, or Eric Weisstein 's pages or "Abramowitz and Stegun"'s book or any of the others -- Good luck Ivar

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