Flutter Study of a Wing with FSI

Simon95Simon95 Member

Hi everyone,

I am doing a project which goal is to study flutter condition of a wing. I have already create the wing and the fluid domain. I have mesh the wing with a fixed support in one side and I have done the modal analysis so I know the modal shapes and the frequencies in Hz. After that, I have mesh the fluid domain and edit the setup in fluent with a velocity inlet. Then I coupled both setup (Transient strutural and Fluid Flow (Fluent)) with the System Coupling module, and everything is ok. 

I can run the simulation correctly, but I don´t know how to determine the flutter velocity. I have read that I have to fix Mach number and vary Dynamic Pressure but I don´t know how to do that and after that where should i be able to realize that flutter condition has been achieved.

I need help from anyone who knows anything about this topic, please.

Thank you all in advance!

Comments

  • RobRob UKForum Coordinator
    edited May 2019

    Assuming the wing is moving monitor the position of a point on the wing with time. Velocity will return the flow velocity so isn't what you're looking for. 

  • Simon95Simon95 Member
    edited May 2019

    Hi rwoolhou,

    Thanks for your opinion. I think that is a good idea, but I don´t know how i can do that. I have created a point in fluent but when I try to make a new plot with the position I couldn´t do it. I could report things like pressure or velocity, but no position. Can you please give me some advice?

    Thanks in advance.

  • RobRob UKForum Coordinator
    edited May 2019

    Look under Mesh and you'll find the x, y, & z coordinates. 

  • Simon95Simon95 Member
    edited May 2019

    Ok, I got what you suggest. But I would like to see it in a plot, so that I can realize if the mesh displacement converges o diverges. Do you know how I can put this information in a plot, y axis-Position, x-axis time?.

    THank you!

  • RobRob UKForum Coordinator
    edited May 2019

    Ah, use a monitor of "something" and time. You can then export the data in text format and/or plot on the screen. 

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