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Joule Heating

Posted 10.08.2018, 14:33 GMT-4 Electromagnetic Heating, Low-Frequency Electromagnetics Version 5.3a 1 Reply

Talha Irshad
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Hi Guys Salaam I am doing simulation of IC pins On Comsol. My Objective is to evaluate the joule heating effect on the IC Pins due to the injection of electirc current pulse.

While simulation, I have encountered a problem given. If someone guides me what does this error means.

ERROR

Undefined variable. - Variable: PortName - Global scope Failed to evaluate operator. - Operator: if - Global scope Failed to evaluate expression. - Expression: if(PortName==1,if((comp1.ec.term1.int(comp1.ec.I0)/comp1.ec.term1.int(1))!=0,comp1.ec.term1.int(comp1.ec.I0)/comp1.ec.term1.int(1),1),0) Failed to evaluate variable. - Variable: comp1.ec.I0_1 - Defined as: if(PortName==1,if((comp1.ec.term1.int(comp1.ec.I0)/comp1.ec.term1.int(1))!=0,comp1.ec.term1.int(comp1.ec.I0)/comp1.ec.term1.int(1),1),0) Failed to evaluate expression. - Expression: d(comp1.ec.I0_1test(comp1.ec.term1.V0_ode),{test@1}) Failed to evaluate Jacobian of expression. - Expression: comp1.ec.I0_1test(comp1.ec.term1.V0_ode) error in COMSOL

1 Reply Last Post 17.08.2018, 04:15 GMT-4
Tae Eun Kim
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Posted: 6 years ago 17.08.2018, 04:15 GMT-4

Hi,

I think you use Activate manual terminal sweep option in Electric Current Interface. So, To solve this problem, you need to setup PortName in Global Definitions > Parameters, and then add Parametric Sweep in Study.

See the example model.

PortName is 1, left boundary condition works. PortName is 2, right boundary condition works.

Thanks.

Hi, I think you use **Activate manual terminal sweep** option in Electric Current Interface. So, To solve this problem, you need to setup PortName in Global Definitions > Parameters, and then add Parametric Sweep in Study. See the example model. PortName is 1, left boundary condition works. PortName is 2, right boundary condition works. Thanks.

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