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Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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mixture of materials

Posted 2013年3月29日 GMT-4 11:54 Materials Version 4.3a 5 Replies

Zdeno Zitny
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Hey.

It can be used as material mix more materials?

Thank you.
5 Replies Last Post 2013年4月3日 GMT-4 16:58
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2013年3月30日 GMT-4 03:26
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
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
Zdeno Zitny
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Posted: 1 decade ago 2013年3月30日 GMT-4 04:51
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.
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.
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2013年3月30日 GMT-4 06:54
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
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
Zdeno Zitny
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Posted: 1 decade ago 2013年3月30日 GMT-4 10:31
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.
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.
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2013年4月3日 GMT-4 16:58
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
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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