Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.
Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
microwave heating
Posted May 27, 2012, 11:29 p.m. EDT Version 4.0 2 Replies
Please login with a confirmed email address before reporting spam
Hello,
In microwave heating, material permittivity in different temperature is different.
But in comsol process, when we heating material, temperature is rise, material permittivity will be different, isn't it?
So In microwave heating simulation material permittivity is changed or not?
Thank you very much!
In microwave heating, material permittivity in different temperature is different.
But in comsol process, when we heating material, temperature is rise, material permittivity will be different, isn't it?
So In microwave heating simulation material permittivity is changed or not?
Thank you very much!
2 Replies Last Post May 28, 2012, 8:20 p.m. EDT
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
Hi
that depends on how you define your dependent varaibles, if your material permittivity is explicitely dependent on T and you have a varying T solved during the solver process then COMSOL will take the permittivity change into account, you will see COMSOl using an iterative non-linear solver to loop around, you can also see this in the segregated solver steps, which variable comes first then second etc.
Now v4.0 was somehwat limited in its automatic set up of all solver conditions and you might need to adapt the solver ndes by hand, in certain cases. It's highly improved in the later versions
--
Good luck
Ivar
that depends on how you define your dependent varaibles, if your material permittivity is explicitely dependent on T and you have a varying T solved during the solver process then COMSOL will take the permittivity change into account, you will see COMSOl using an iterative non-linear solver to loop around, you can also see this in the segregated solver steps, which variable comes first then second etc.
Now v4.0 was somehwat limited in its automatic set up of all solver conditions and you might need to adapt the solver ndes by hand, in certain cases. It's highly improved in the later versions
--
Good luck
Ivar
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
Thank you very much