mixture of materials

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Zdeno Zitny

Zdeno Zitny

March 29, 2013 3:54pm UTC

mixture of materials

Hey.

It can be used as material mix more materials?

Thank you.

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Ivar Kjelberg

Ivar Kjelberg

March 30, 2013 7:26am UTC in response to Zdeno Zitny

Re: mixture of materials

Hi

do you mean you have an alloy or a mixture of liquids ? THis can be done but COMSOL does not know how this mixture behaves. For chemistry and liquids you have special 2 (or more?) species physics check the doc.

But for i.e. solid its trickier as i.e. mixing iron and nickel gives you many "different" materials all depending on ratio temperature history ... and with very different material properties such as E, nu, rho, alpha(T) ...

--
Good luck
Ivar

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Zdeno Zitny

Zdeno Zitny

March 30, 2013 8:51am UTC in response to Ivar Kjelberg

Re: mixture of materials

But the moist air mixture is known for Comsol, but when it is used, so the solver fails and writes an error or not complete the calculation.

Similarly, if we use a porous material in AC / DC solver writes a mistake without me set other inputs.

Thank you.

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Ivar Kjelberg

Ivar Kjelberg

March 30, 2013 10:54am UTC in response to Zdeno Zitny

Re: mixture of materials

Hi

true COMSOL has added the moist air mixture lately, that is handy.

But so far I haven't seen any error with it, so you need to upload you models for us out here to be more specific, like that it's too vague and I do not know what to answer ;)

--
Good luck
Ivar

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Zdeno Zitny

Zdeno Zitny

March 30, 2013 2:31pm UTC in response to Ivar Kjelberg

Re: mixture of materials

Hey.

Tray this:

1.in new models give rectangle, ac \ dc \ mf (magnetic field)
2.A mf open Ampers Law and forth to adjust the part of the magnetic permeability
poros material
3.click study compute

and send me a reply or error.

part of the amount of porous material I enter 0.4.

Thank you very much.

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Ivar Kjelberg

Ivar Kjelberg

April 3, 2013 8:58pm UTC in response to Zdeno Zitny

Re: mixture of materials

Hi

but if you have a porous media you need at least 2 materials (applied to the same domain, no?)
Check the doc/help the Porous node requires some settings and the sum of porosities should sum up to 1

--
Good luck
Ivar

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