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fiber

Posted May 20, 2012, 7:36 a.m. EDT RF & Microwave Engineering Version 4.2 4 Replies

Deepak Jain
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a

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4 Replies Last Post Dec 17, 2012, 2:31 p.m. EST
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago May 20, 2012, 9:14 a.m. EDT
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 May 20, 2012, 9:53 a.m. EDT
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 May 20, 2012, 10:40 a.m. EDT
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 Dec 17, 2012, 2:31 p.m. EST
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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