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Error while solving

Posted Jan 23, 2011, 5:57 a.m. EST MEMS & Nanotechnology, MEMS & Piezoelectric Devices 4 Replies

Rahul Ramachandran
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Hi,
I am getting the following error while solving a 2D axi-symmetric model of electrowetting. I had defined the material epsilon. Used both triangular and quadrilateral meshing. Getting the same error both the times.

Failed to evaluate variable Jacobian.
- Variable: mat.epsilonr11
- Geometry: 1
- Domain: 1

Kindly help..
4 Replies Last Post Jan 24, 2011, 2:47 a.m. EST
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Jan 23, 2011, 6:30 a.m. EST
Hi

That appears typically when you have forgotten to define all parameters of the materials used, check your materials, note that when you change some physics parameters often you need other material proparties, and sometimes these are not all defined
--
Good luck
Ivar
Hi That appears typically when you have forgotten to define all parameters of the materials used, check your materials, note that when you change some physics parameters often you need other material proparties, and sometimes these are not all defined -- Good luck Ivar
Rahul Ramachandran
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Posted: 1 decade ago Jan 23, 2011, 8:29 a.m. EST
Thanks for the reply Ivar
I had read the same in one earlier post and checked if I had defined the material properties.
I also tried defining the relative permittivity of the materials as global variables too...
still the same error message is displayed while solving...
if you have any idea please help.

With regards
Rahul
Thanks for the reply Ivar I had read the same in one earlier post and checked if I had defined the material properties. I also tried defining the relative permittivity of the materials as global variables too... still the same error message is displayed while solving... if you have any idea please help. With regards Rahul
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Jan 23, 2011, 4:23 p.m. EST
Hi

which version are you running ? since I have got the 4.1 patched I cannot remember any of those

--
Good luck
Ivar
Hi which version are you running ? since I have got the 4.1 patched I cannot remember any of those -- Good luck Ivar
Rahul Ramachandran
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Posted: 1 decade ago Jan 24, 2011, 2:47 a.m. EST
I am using v4.0a
I am using v4.0a

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