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how to define material pixel by pixel?

Posted 2017年2月22日 GMT-5 08:59 Low-Frequency Electromagnetics, Materials Version 5.2a 7 Replies

Leyla Roohisefat
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Hi,
Does anyone have any idea that how I can define my material pixel by pixel? Thank you in advance.
7 Replies Last Post 2017年2月23日 GMT-5 12:05
Jeff Hiller COMSOL Employee

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Posted: 8 years ago 2017年2月22日 GMT-5 14:20
In COMSOL, you can type in spatially-varying functions for your material properties.
If, for instance, you want an electric conductivity to vary as 1+x, simply type 1+x in the text field for the electric conductivity.
There are many pre-implemented mathematical functions for you to use. Please refer to the Reference Manual for COMSOL Multiphysics, version 5.2a, around page 232.
Best,
Jeff
In COMSOL, you can type in spatially-varying functions for your material properties. If, for instance, you want an electric conductivity to vary as 1+x, simply type 1+x in the text field for the electric conductivity. There are many pre-implemented mathematical functions for you to use. Please refer to the Reference Manual for COMSOL Multiphysics, version 5.2a, around page 232. Best, Jeff
Leyla Roohisefat
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Posted: 8 years ago 2017年2月23日 GMT-5 04:17
Thanks for your reply. Unfortunately values can not be define by a function.
Thanks for your reply. Unfortunately values can not be define by a function.
Jeff Hiller COMSOL Employee

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Posted: 8 years ago 2017年2月23日 GMT-5 07:56
How are they defined?
Jeff
How are they defined? Jeff
Leyla Roohisefat
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Posted: 8 years ago 2017年2月23日 GMT-5 08:43
They are defined by a matrix. for each voxel there is a different value.
They are defined by a matrix. for each voxel there is a different value.
Jeff Hiller COMSOL Employee

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Posted: 8 years ago 2017年2月23日 GMT-5 09:08
You have several possibilities. Off the top of my head: interpolation functions, image functions and calling a MATLAB function (that last one assumes you have LiveLink for MATLAB on your license). See the COMSOL Multiphysics Reference Manual's section on functions for more info on these options.
Best,
Jeff
You have several possibilities. Off the top of my head: interpolation functions, image functions and calling a MATLAB function (that last one assumes you have LiveLink for MATLAB on your license). See the COMSOL Multiphysics Reference Manual's section on functions for more info on these options. Best, Jeff
Leyla Roohisefat
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Posted: 8 years ago 2017年2月23日 GMT-5 10:23
I think Interpolation function can help in this case. Thank you very much for your help!
I think Interpolation function can help in this case. Thank you very much for your help!
Suresh Seetharam
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Posted: 8 years ago 2017年2月23日 GMT-5 12:05
Hello,


Just to supplement Jeff's response, an interesting post to look into (Walter Frei's response).

www.comsol.it/community/forums/general/thread/1381


Suresh
Hello, Just to supplement Jeff's response, an interesting post to look into (Walter Frei's response). https://www.comsol.it/community/forums/general/thread/1381 Suresh

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