Learning Forum

[Anthony Irvine]

i have done a modal analysis and discovered the eigenmodes but now I want to set up some sort of forced vibration so that I can vibrate my structure at a natural frequency and have it react with the correct mode shapes however I need to be able to couple this system with another in fluent to see how the entire system behaves. I've tried a coupled system using transient structural but the mode shape is not correct I'm also not sure if I have set the vibration properly in transient as it just used an acceleration with a function to make the acceleration sinusoidal. how should I go about this? any help is appreciated 

[Erik Kostson]

Hi

 

Can you explain more what you are trying to simulate - also provide some images of the set up?

Thank you

Erik

[Anthony Irvine]

I want to simulate a pipe which is vibrating at a natural frequency which then has water going through it and then I want to see how the natural frequency and therefore the vibratory motion of the pipe affects the rate of flow and other similar parameters.

thanks

[Erik Kostson]

Hi

So why would the vibration infleunce the flow in the pipe at least the flow rate?

Are you tryng to model a Coriolis Flow meter?

All the best

Erik

[Anthony Irvine]

With certain geometry and eigenmodes, the vibrations can cause a pump like effect, which would hopefully increase flow rate or pressure and I would like to try to simulate this so I can improve my geometry.