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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 The information provided may be out of date.

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fiber

Posted 2012年5月20日 GMT-4 07:36 RF & Microwave Engineering Version 4.2 4 Replies

Deepak Jain
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a

Attachments:

4 Replies Last Post 2012年12月17日 GMT-5 14:31
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2012年5月20日 GMT-4 09:14
Hi

I suspect its your .r^2 .r I assume you mean *r^2 and *r, no ?

--
Good luck
Ivar
Hi I suspect its your .r^2 .r I assume you mean *r^2 and *r, no ? -- Good luck Ivar
Deepak Jain
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Posted: 1 decade ago 2012年5月20日 GMT-4 09:53
yes Ivar its *r. Moreover I should use d(Ez,r) for differentiation. i have changed this but i get zero answer. probably its not understanding radial derivative. whats the way to implement that.

thanks
Deepak
yes Ivar its *r. Moreover I should use d(Ez,r) for differentiation. i have changed this but i get zero answer. probably its not understanding radial derivative. whats the way to implement that. thanks Deepak
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2012年5月20日 GMT-4 10:40
Hi

you need to write out the cylindrical coordinate differential from the x and y derivatives. By the way normally you have alread Exx and Exy ... defined

you can define a cylindrical coordinate system to express your sys2.r

Unfortunately COMSOL does not understand d(Ex,sys2.r)

You could also then consider using a higher discretization order to try to get smoother results

--
Good luck
Ivar
Hi you need to write out the cylindrical coordinate differential from the x and y derivatives. By the way normally you have alread Exx and Exy ... defined you can define a cylindrical coordinate system to express your sys2.r Unfortunately COMSOL does not understand d(Ex,sys2.r) You could also then consider using a higher discretization order to try to get smoother results -- Good luck Ivar
Md. Selim Habib
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Posted: 1 decade ago 2012年12月17日 GMT-5 14:31
Could u give me the file on bending fiber in v 4.2.
Thanks in advance.
Could u give me the file on bending fiber in v 4.2. Thanks in advance.

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