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SimSolid Thermal Analysis - Temperature results with T max over the boundary conditions without a source of heat.

User: "macastanove"
macastanove
Altair Community Member
Updated by macastanove

Hello,

I am currently working in a thermal - structural model for a furnace steel structure. Specifically, in the thermal analysis, I set up a boundary condition of temperature in the interior metal wall (50 C) as well as in the sit of the burners (70 C). In addition I have a convection condition in all the exterior walls (10 W/m^2 K for an ambient temperature of 30 C).

image

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Due to the maximum temperature that I have established (70 C max.), as well as the fact that doesn't exist any other kind of heat source, I expected to get a thermal distribution with a maximum value of 70 C in the area that I have specified. But in reality I'm obtaining a distribution where the maximum temperature is 72.1 C.

image

 

Why is the model reaching a temperature over the boundary condition?

PD: The whole structure is made up with steel. I have already checked the thermal properties of the material and there is no problems there.

Thanks,

Regards.

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    User: "Gouthami Polina_22137"
    Gouthami Polina_22137
    Altair Employee
    Updated by Gouthami Polina_22137

    Hi Mauricio,

    What are your solution settings? Can you please try setting it to Global+local and run the thermal analysis? Would be great if you can share the model so that I can have a look too.

    Thanks,

    Gouthami

    User: "macastanove"
    macastanove
    Altair Community Member
    OP
    Updated by macastanove

    Hi Mauricio,

    What are your solution settings? Can you please try setting it to Global+local and run the thermal analysis? Would be great if you can share the model so that I can have a look too.

    Thanks,

    Gouthami

    Hi, 

    Thanks for your response 

    I already use the Global + local configuration, but the results are the same.

    Of course I can share with you the model. I'll keep trying to finde a solution to this problem.

     

    2024_05_06_HB_TS.rar
    User: "Gouthami Polina_22137"
    Gouthami Polina_22137
    Altair Employee
    Updated by Gouthami Polina_22137

    HI Mauricio, 

    can you please share the CAD as well?

    Thanks,

    Gouthami

    User: "macastanove"
    macastanove
    Altair Community Member
    OP
    Updated by macastanove

    HI Mauricio, 

    can you please share the CAD as well?

    Thanks,

    Gouthami

    Hi, Gouthami, 

    So sorry that I forget to share it with you before, here it is.

    Thanks for your help,

    Mauricio

    HB_CAE_SA.rar
    User: "Gouthami Polina_22137"
    Gouthami Polina_22137
    Altair Employee
    Updated by Gouthami Polina_22137

    Hi, Gouthami, 

    So sorry that I forget to share it with you before, here it is.

    Thanks for your help,

    Mauricio

    Hi Mauricio, 

    Thank you for sharing the file. We investigated the model and confirmed that the numbers above 70 are just numerical noise coming from the approximations, which can be ignored. 

    Thanks,

    Gouthami

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