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undefined variable comp.2.ht.rhoref, coupling between heat transfer and laminar flow after upgrade to 5.3a

Posted Feb 20, 2018, 12:31 a.m. EST Heat Transfer & Phase Change, Heat Transfer Version 5.3a 3 Replies

Habimana J Willy
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Hi everyone,

I m modelling a coupling between heat tranfer and laminar flaw using a nitf multiphysics coupling. My model runs welll in 5.3 but when i use 5.3a an erro msg comes out as if the solver can not find the reference density though it is set to be taken from ht interface.

error: undefined variable. -variable: comp1.ht.rhoref -Geometry: 11 Failed to evaluae the Jacobian of expression : dvol(((-comp1.ht.Ceff)comp1.ht.timeDerivative )Comp1.ht.

Can anyone give me a quick hint?

Regards,

3 Replies Last Post Mar 12, 2018, 4:36 a.m. EDT
Sai Phani Kiran Hota
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Posted: 7 years ago Mar 9, 2018, 4:26 p.m. EST

Hi Habimana, I am facing a similar issue while trying to solve coupled phase change problem. Also, as you said your model did run in 5.3 right, if you don't mind could you kindly share the file with me

Hi Habimana, I am facing a similar issue while trying to solve coupled phase change problem. Also, as you said your model did run in 5.3 right, if you don't mind could you kindly share the file with me
Habimana J Willy
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Posted: 7 years ago Mar 10, 2018, 12:00 a.m. EST
Updated: 7 years ago Mar 10, 2018, 12:00 a.m. EST

Hi Sai Phani Kiran Hota,

Have you found a way to solve the issue?

Hi Sai Phani Kiran Hota, Have you found a way to solve the issue?
Nicolas Huc COMSOL Employee

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Posted: 7 years ago Mar 12, 2018, 4:36 a.m. EDT

Dear Habimana, dear Sai Phani Kiran Hota,

Could you send a repeat model to the support and address it to me ? I'll be happy to check the issue and help to find a solution,

Best regards, Nicolas

Dear Habimana, dear Sai Phani Kiran Hota, Could you send a repeat model to the support and address it to me ? I'll be happy to check the issue and help to find a solution, Best regards, Nicolas

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