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Do .stl files work on Hyperworks CFD?

RipfumeloUser: "Ripfumelo"
Altair Community Member
Updated by Ripfumelo

Hi, i was wondering does Altair Inspire or Hyperworks CFD support fluid flow simulation for .stl or mesh file, i made a solid cylinder then applied a TPMS lattice in it, noticed Inspire would not let me select an inlet/outlet probably because its now a mesh (Implicit to Triangular mesh). Any way to work around this? i just want to perform a fluid flow plus thermal analysis to see how the lattice cylinder compares to a hollow cylinder in terms of pressure drop, temperature and velocity.

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    acuproUser: "acupro"
    Altair Employee
    Accepted Answer
    Updated by acupro

    You could try to import the STL using

    File > Import > Solver Deck > and set the type to .stl.

    You'll still need to make sure it defines the boundaries of a solid body (or bodies) in order to proceed with the 'Validate' process, create the volume mesh, and the simulation.

    RipfumeloUser: "Ripfumelo"
    Altair Community Member
    OP
    Updated by Ripfumelo

    Alright thanks, i will try that, will be back here if i experience some problems.

    RipfumeloUser: "Ripfumelo"
    Altair Community Member
    OP
    Updated by Ripfumelo

    Hi @acupro , i tried the instruction, the geometry does not appear, could it be that i made the .stl from 2023 version of inspire then work on a 2022 version of Hyperworks CFD? I've attached the sample file below. Thanks

    acuproUser: "acupro"
    Altair Employee
    Updated by acupro

    Hi @acupro , i tried the instruction, the geometry does not appear, could it be that i made the .stl from 2023 version of inspire then work on a 2022 version of Hyperworks CFD? I've attached the sample file below. Thanks

    I am able to import that .stl on Windows in both HyperWorks CFD 2022.3 and HyperMesh CFD 2023.1.  Are you using EDU/Student license - or commercial/paid?

    RipfumeloUser: "Ripfumelo"
    Altair Community Member
    OP
    Updated by Ripfumelo

    Hi Acupro thanks for getting back to my question, it's promising when it works on your side, i'm using student license. 

    RipfumeloUser: "Ripfumelo"
    Altair Community Member
    OP
    Updated by Ripfumelo

    Hi Acupro thanks for getting back to my question, it's promising when it works on your side, i'm using student license. 

    Here's a short clip of what i did.

    acuproUser: "acupro"
    Altair Employee
    Updated by acupro

    Hi Acupro thanks for getting back to my question, it's promising when it works on your side, i'm using student license. 

    It may be a limitation with the Student Edition - trying to get more details on that.
    https://altairuniversity.com/altair-student-edition-limitations/

    When that large Solver Import Option panel opens, before you hit the final 'Import', what happens if you switch the reader options to Reader > STL instead of OptiStruct, then use the defaults?  (Your recording shows you using HyperWorks.  Is the behavior the same when using HyperWorks CFD?  I expect yes, but want to be sure - as that is where you would set up the CFD solution.)

    RipfumeloUser: "Ripfumelo"
    Altair Community Member
    OP
    Updated by Ripfumelo

    It may be a limitation with the Student Edition - trying to get more details on that.
    https://altairuniversity.com/altair-student-edition-limitations/

    When that large Solver Import Option panel opens, before you hit the final 'Import', what happens if you switch the reader options to Reader > STL instead of OptiStruct, then use the defaults?  (Your recording shows you using HyperWorks.  Is the behavior the same when using HyperWorks CFD?  I expect yes, but want to be sure - as that is where you would set up the CFD solution.)

    Alright thanks let me try what you said and will update you.

    RipfumeloUser: "Ripfumelo"
    Altair Community Member
    OP
    Updated by Ripfumelo

    I tried the stl setting and Hyperworks CFD, no luck. Maybe its some limitations for the license.

    RipfumeloUser: "Ripfumelo"
    Altair Community Member
    OP
    Updated by Ripfumelo

    Hey i noticed something, you did mention it may be student license limitations, which is true. I guess i'll design in Inspire then use third party software for the simulation part because i'll need it to prove my model works for the student global competition. Many Thanks.

     

    image

    acuproUser: "acupro"
    Altair Employee
    Updated by acupro

    Hey i noticed something, you did mention it may be student license limitations, which is true. I guess i'll design in Inspire then use third party software for the simulation part because i'll need it to prove my model works for the student global competition. Many Thanks.

     

    image

    For that model, you would probably very quickly run into the limitation on 500,000 mesh nodes for AcuSolve, too.

    We may be able to get you a temporary license for the full version - so you can continue with Altair products.  What is your main simulation goal for this project?  Which university do you attend?  What is your name and university email address?  (You may also try submitting a ticket with explanation, etc, using your AltairOne login, rather than in this forum.)

    RipfumeloUser: "Ripfumelo"
    Altair Community Member
    OP
    Updated by Ripfumelo

    Hellos, my aim is to show that my new model will have better thermal cooling efficiency, its an electronic system using flowing liquid as the coolant. Would be awesome if i could get a temporary license. I attend Witwatersrand University, i go by the name Ripfumelo, my email address is: 2111420@students.wits.ac.za.

    My trial period on Altair One has expired, i'll need to contact them.