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## #1 2018-11-30 00:39:09

Humberto
Member
Registered: 2012-10-15
Posts: 108
Website

### [Solved] Thermal Flux trough a boundary area

I am conducting a study of thermal flux through some boundary areas, but the Integrale command is not calculating the correct areas.

here is the output table I get:

Flux Energy
NOM_CHAM         NUME_ORDRE   INST         VOL          GROUP_MA         INTE_FLUY    INTE_FLUX    MOYE_FLUY    MOYE_FLUX
FLUX_NOEU                   0  0.00000E+00  1.65161E-01 Outside          -1.46523E+00  7.78683E-03 -8.87156E+00  4.71469E-02
FLUX_NOEU                   0  0.00000E+00  1.65161E-01 Inside           -1.46523E+00  7.78683E-03 -8.87156E+00  4.71469E-02
FLUX_NOEU                   0  0.00000E+00  1.65161E-01 Screwt           -1.46523E+00  7.78683E-03 -8.87156E+00  4.71469E-02

But the Real Areas of the surfaces as measured in the mesh module

Outside---> 0.08252335
Inside----> 0.08258048
Screwt----->5.713349e-5

So why Am I getting 1.6516 E-1 which happens to be twice the area of the Inside surface!!! Also Inside = Outside + Screwt and they are all reported with the same 1.6516E-1

Any ideas?

I am attaching the comm file.

Last edited by Humberto (2018-11-30 19:57:20)

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## #2 2018-11-30 09:58:01

RichardS
Member
From: Munich, Germany
Registered: 2010-09-28
Posts: 563
Website

### Re: [Solved] Thermal Flux trough a boundary area

Hi Humberto,
it seems like the INTEGRALE factor key word calculates the total value on the ensemble of the 3 assigned faces. Try to use one INTEGRALE for each single face (so three _F(..)), that should give you what you are expecting.

Best,
Richard

Richard Szoeke-Schuller
Product Management
www.simscale.com
We are hiring! https://www.simscale.com/jobs/

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Humberto
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