Eigenvalue of fluid

VAL1
VAL1 Altair Community Member
edited October 2020 in Community Q&A

I'd like to get resonance frequency below picture object.

It is filled with R134a(air).

Is it possible? how to set?

<?xml version="1.0" encoding="UTF-8"?>0611001.png

Tagged:

Answers

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited June 2019

    Please refer attached MFLUID example in OptiStruct.

    Unable to find an attachment - read this blog

  • VAL1
    VAL1 Altair Community Member
    edited June 2019

    Thank you!

    But I think this calculates steel container.

    I want to handle air or fluid itself... 

     

  • Rex_22369
    Rex_22369 Altair Community Member
    edited November 2019
    Altair Forum User said:

    Please refer attached MFLUID example in OptiStruct.

     

    Hi Rahul,

     

    Always finding good feedback from you, one question from my side, may I use tet10 instead of 2D mesh then use MFUILD in it? or I must use shell element for the container? If the MFUID can only use on the shell element, may I put a very thin layer on the solid elements, then use MFUID on this thin layer?

    Thanks in advance!

     

    Unable to find an attachment - read this blog

  • Tommy_21858
    Tommy_21858 Altair Community Member
    edited November 2019

    If you want to calculate the eigenvalues of this fluid you must mesh your ring (air) with solid. Further you have to set the FCTN flag in your PSOLID Card and choose an MAT10 - Card. You dont have to model the surrounding structure of the fluid.

     

    Best regards

  • Rex_22369
    Rex_22369 Altair Community Member
    edited November 2019
    Altair Forum User said:

    If you want to calculate the eigenvalues of this fluid you must mesh your ring (air) with solid. Further you have to set the FCTN flag in your PSOLID Card and choose an MAT10 - Card. You dont have to model the surrounding structure of the fluid.

     

    Best regards

    Hi Tommy, thanks for your answer if this is to my question.

    I will try on Monday, the MFLUID only supports for shell element, if I model the tank in solid, then it will be a problem apply the MFLUID on the mesh, I do not care about the eigenvalue of fluid,  I just want to know the fluid influence on the tank.

     

    Thanks again

Categories