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  • Non-dimensional analysis about VIV

    Posted by Tianyang Zhao on February 22, 2023 at 7:45 pm

    Hi Dr. Kadappa,
    Hope you are doing well.
    I’m confused about one problem. For fluid simulation, what we need to confirm is only the Reynolds number, for example, to compare our result with other experiment data or simulation data, we need to make sure the Reynolds number is consistent with the reference. But how about FSI simulations? Which non-dimensional numbers are matter apart from Reynolds number, mass ratio, frequency ratio, reduce velocity, and damping ratio, are they enough?
    I’ll appreciate your response.
    Best Regards,
    Tianyang

    Chennakesava replied 1 year, 3 months ago 2 Members · 2 Replies
  • 2 Replies
  • Chennakesava

    Member
    March 6, 2023 at 6:52 pm

    Test response

  • Chennakesava

    Member
    March 6, 2023 at 6:54 pm

    Hello Tianyang,

    That is a very good question!

    Yes, in addition to the Reynolds number, Strouhal number, amplitude ratio, damping ratio, mass ratio (or reduced mass), frequency ratio and reduced velocity are the key non-dimensional parameters in vortex-induced vibration problems. All of these are important. We have more components (spring, damper and mass) in a VIV problem; therefore, we need more parameters to characterise the response.

    Do not worry. It takes some time to get used to these parameters. You will understand them better once you start using them. The response is typically presented in terms of these non-dimensional parameters.

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