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February 2, 2006, 09:56 |
Vortex Induced vibration of subsea pipeline
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#1 |
Guest
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Hi,
I am trying to model the vortex induced vibration for subsea pipeline. basically the flow over the subsea pipeline creates vortex which cuases the pipe to vibrate. What i have done so far i have a created a 2d model of a pipe within a square and passed the flow over it. But becuase the pipe in the middle is fixed it wont create any vortexs. I was wondering if anyone could help me. I am not really an expert in fluent and have only been using it for a short while. |
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February 2, 2006, 10:05 |
Re: Vortex Induced vibration of subsea pipeline
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#2 |
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You should have vortices even if the pipe is fixed.
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February 2, 2006, 10:20 |
Re: Vortex Induced vibration of subsea pipeline
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#3 |
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can you have a look at this document Page 5, I am after to get vortex like that. But what i am getting is just showing a vortex around the pipe wall. do I need to use dynamic mesh for this case?
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February 3, 2006, 05:38 |
Re: Vortex Induced vibration of subsea pipeline
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#4 |
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which document?
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February 4, 2006, 19:40 |
Re: Vortex Induced vibration of subsea pipeline
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#5 |
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First of all, you should study the Fluent tutorial about the flow around a circular cylinder. In this tutorial you can learn how to obtain vortex-shedding and calculate the Strouhal number.
One reason why you are not detecting vortex-shedding in your simulation may be the discretization of the convective terms in the Navier-Stokes equation. In general, first-order upwind and power-law interpolation generate false-diffusion and make difficult to simulate vortex-shedding. You must use at least second-order schemes. |
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February 9, 2006, 07:07 |
Re: Vortex Induced vibration of subsea pipeline
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#6 |
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I have access to Fluentusers.com website, but could not find any tutorial regarding "flow around a circular cylinder". Do you know where I can find this tutorial ? thank you
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