Pipe fluid interaction

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hi

I'm trying to perform modal analysis of a closed pipe with fluid inside it. For fluid, i used MAT10 card and PFLUID fctn property. I created nodesets for fluid and structure interaction faces, and using ACMODL cards, defined FSETS and SSETS. Also I'm getting the .interface file but I'm not getting the pipe-fluid modes.. Not sure where I'm doing wrong..

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Answers

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited January 2016

    Hi,

    If you are using EIGRL card to extract the fluid modes set the case control command as below

     

    METHOD ( FLUID) = 1

     

    Where '1' refers to the identification number of EIGRL card

     

    Rest of the things remains same as normal structural mode extraction method

     

    Regards

    Rahul R

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited January 2016

    Hi Rahul,

     

    Yes for fluid modes I'm using METHOD(FLUID) = ID no. of EIGRL card, but I'm getting two different modes, i.e one for structure and other for fluid.. I want coupled modes of structure-fluid interaction..

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited January 2016

    Bump..

    Any way to get coupled modes by applying boundary conditions to fluid elements ?

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited January 2016

    Hi,

    See attached screenshot from user guide.

     

    Regards

    Rahul R

    <?xml version="1.0" encoding="UTF-8"?>MFLUID.JPG

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