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Fluid Structure Interaction

Posted 02.04.2021, 09:45 GMT-4 2 Replies

Sahrish Naqvi
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Hi Dear COMSOL community

I am trying to solve one fluid-structure interaction problem, where one rigid plate (maroon color) merged in fluid, and the plate should vibrate from the right end with angular velocity given in the attached figure. I cannot apply angular velocity in the available multiphysics coupling in the Fluid-Structure module of COMSOL. I will appreciate it if anyone could help me with how I could apply this angular velocity as a boundary condition at the left end of the plate. The fluid is supposed to be stationary.

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2 Replies Last Post 02.04.2021, 12:00 GMT-4
Jeff Hiller COMSOL Employee

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Posted: 4 years ago 02.04.2021, 10:46 GMT-4
Updated: 4 years ago 02.04.2021, 12:08 GMT-4

Hello Sahrish,

If the plate is rigid and you only care about how its oscillations induce flow, you can use the Deformed Mesh Interface. The angular rotation in your case looks like it's going to be relatively small, but this blog post should still be useful to you. This one is closely related to your interest, and a fun read too. You will probably also enjoy this other blog post on modeling fish swimming, especially if you may at some point be interested in looking at the stresses inside the plate.

Best,

Jeff

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Jeff Hiller
Hello Sahrish, If the plate is rigid and you only care about how its oscillations induce flow, you can use the Deformed Mesh Interface. The angular rotation in your case looks like it's going to be relatively small, but [this blog post](https://www.comsol.com/blogs/deformed-mesh-interfaces-rotations-and-linear-translations/) should still be useful to you. [This one](https://www.comsol.com/blogs/how-to-improve-your-paddle-stroke-with-simulation/) is closely related to your interest, and a fun read too. You will probably also enjoy [this other blog post](https://www.comsol.com/blogs/studying-the-swimming-patterns-of-fish-with-simulation/) on modeling fish swimming, especially if you may at some point be interested in looking at the stresses inside the plate. Best, Jeff
Sahrish Naqvi
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Posted: 4 years ago 02.04.2021, 12:00 GMT-4

Hello Sahrish,

If the plate is rigid and you only care about how its oscillations induce flow, you can use the Deformed Mesh Interface. The angular rotation in your case looks like it's going to be relatively small, but this blog post should still be useful to you. [This one] is closely related to your interest, and a fun read too. You will probably also enjoy this other blog post on modeling fish swimming, especially if you may at some point be interested in looking at the stresses inside the plate.

Best,

Jeff

Dear Jeff

Thank you so much for your response. Let me check the blog post, i hope I will come up with something. Will get back to you.

Sahrish

>Hello Sahrish, > >If the plate is rigid and you only care about how its oscillations induce flow, you can use the Deformed Mesh Interface. The angular rotation in your case looks like it's going to be relatively small, but [this blog post](https://www.comsol.com/blogs/deformed-mesh-interfaces-rotations-and-linear-translations/) should still be useful to you. [This one] is closely related to your interest, and a fun read too. You will probably also enjoy [this other blog post](https://www.comsol.com/blogs/studying-the-swimming-patterns-of-fish-with-simulation/) on modeling fish swimming, especially if you may at some point be interested in looking at the stresses inside the plate. > >Best, > >Jeff Dear Jeff Thank you so much for your response. Let me check the blog post, i hope I will come up with something. Will get back to you. Sahrish

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