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August 22, 2018, 14:09 |
Imposed vibration on a pipe with flow
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#1 |
New Member
Fernando Santos
Join Date: May 2014
Location: Brazil
Posts: 6
Rep Power: 12 |
Hey guys
I need to simulate a flow inside a pipe, but with the pipe vibrating in a manner that the channel opens and closes. The vibration is prescribed, I'm only interested in the effects on the fluid, not on the solid. I wanted to know if it is possible on Star-CCM+. Also, the solid displacament should be very big, and I have no idea how that behaves with the mesh in a fluid simulation, regardless of the software. Thing is, I can't find anything similar to that on the documentation. The closest one is the FSI tutorial, which doesn't really answer my question. |
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August 23, 2018, 01:31 |
Hi
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#2 |
New Member
Siddharth
Join Date: Jul 2018
Posts: 26
Rep Power: 9 |
Hi Fernando,
Do you have any pictures showing the motion of the pipe? Are there any equations for the motion? (since you said you are imposing the motion on the pipe) I may be able to help you. |
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August 23, 2018, 13:28 |
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#3 | |
New Member
Fernando Santos
Join Date: May 2014
Location: Brazil
Posts: 6
Rep Power: 12 |
Quote:
Thank you for your reply. I made a quick sketch:https://imgur.com/0i3aiid It's that, but in 3D. It is a circular pipe. That's not the complete domain, there is more, but that's the part I'm interested in discussing. As for the movement, I would be using a table of values. I have the area ratio values with time, but not a time function. |
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August 23, 2018, 21:58 |
Mesh morphing?
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#4 | ||
New Member
Siddharth
Join Date: Jul 2018
Posts: 26
Rep Power: 9 |
Quote:
Quote:
Hope this helps. |
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August 24, 2018, 13:16 |
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#5 | |
New Member
Fernando Santos
Join Date: May 2014
Location: Brazil
Posts: 6
Rep Power: 12 |
Quote:
I was already using tables, but for different boundary conditions. I just hope the table that I have will work with this condition. One last question. With this problem, I need for the geometry to close off completely, but I think that could cause numerical issues. I've never worked with fluid-structure interaction before, but I've seen some papers that would not completely block the flow when solids were movind through the fluid. Can you tell me if it is possible to solve something like this? Or should I try to leave some minumum opening? |
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August 24, 2018, 22:04 |
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#6 | |
New Member
Siddharth
Join Date: Jul 2018
Posts: 26
Rep Power: 9 |
Quote:
In my opinion it would be better to go for a minimum opening rather than trying to close it completely when you are using mesh morphing. Also I have seen some videos (https://www.youtube.com/watch?v=RYKolUSipLQ) related overset meshing in Star CCM+ where it is possible to close the flow path completely. You can explore them too. Hope this helps. |
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Tags |
channel flow, fluid-structure, incompressible |
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