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ggoss3-Newcomer
3-Newcomer
March 7, 2022
Question

Temperatures in Creo Simulate Live Fluids always diverge to infinity

  • March 7, 2022
  • 1 reply
  • 2443 views
In Creo Simulate Live Fluids, every system I try to model that includes a heat load (or object with a prescribed temperature) results in the whole system rapidly diverging to infinite temperature. As an example, I would like to model free convective and radiative heat transfer from a simple system consisting of a small hot body attached to an aluminum heatsink (above) and a thin copper sheet below, floating in air, but have been unable to model this in such a way that the temperature of everything does not rapidly diverge to infinity. Analogous simulations in Live Thermal behave as expected.

Is there something I'm missing? Anyone have an example of a model of a simple PCB with chips and heatsinks in air (or similar) with a live fluid sim setup that works?

I have been unable to locate any examples or validation models for Creo Simulate Live Fluids in the Creo documentation (the documentation for this extension is really sparse), but would love to review such items if they exist.

I am using Creo Parametric Release 8.0 and Datecode 8.0.2.0, and get no error messages.

    1 reply

    S
    sacquarone21-Topaz I
    21-Topaz I
    March 10, 2022

    Hello @ggoss 

     

    As a first approach, you may like to get a better understanding on how to configure this kind of studies in the Tutotial we propose in our Creo Parametric Help Center.

     

    Based on my understanding of your business need, I think you'll be interested especially on following ones:

     

    Hope this will help, at least for a first assessment.

     

    Regards,

     

    Serge

    G
    ggoss3-NewcomerAuthor
    3-Newcomer
    March 10, 2022

    Thanks @sacquarone. Unfortunately, I only have access to the Live Simulation Fluids Package (and not the Flow Analysis Package), and these tutorials do not port over to the Live Simulations Fluid Interface at all. Are analogous tutorials for the Live Fluids Package available?

    S
    sacquarone21-Topaz I
    21-Topaz I
    March 11, 2022

    Hello @ggoss 

     

    oh ok, sorry for initial misundrestanding. Indeed, actually what you need seems to be more appropriate to the scope of Flow Analysis, rather than Live Simulation Fluids.

     

    That being said, regarding Live Simulation Fluids, yes, you have also access to examples (with downloadable model) in Example—External Fluid Simulation in Creo Simulation Live section of Creo Parametric Help Center. Just consider however that this study is oriented to use input like Flow Velocity, Outlet Pressure & Slip Symmetry, and not really convective and radiative heat transfer as it was possible to do in the scope of Flow Analysis.

     

    You may prefer therefore guidance in Example: Thermal Simulation section, where you define as input:

    • Heat Flow Loads in mW, and Boundary Conditions
    • with convetion coefficients in mW/mm^2 and prescribed temperatures in degree C.

     

    Regards,

     

    Serge

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