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Solid and Fluid motion with eigenfrequency study

Posted 7 sept. 2015, 18:01 UTC−4 Fluid & Heat, Acoustics & Vibrations, Computational Fluid Dynamics (CFD), Studies & Solvers, Structural Mechanics Version 4.4 1 Reply

JeeWon Suh
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Hello,

I made a very simple geometry in 2D, such as the cross-section of a microcapillary.

I want to find some eigenfrequency which can make a few modes on a microcapillary.

So, for the shell I used solid mechanics study and for the fluid in the shell, I chose the creeping flow.

To find eigenfrequency, I added pressure acoustics with frequency domain.

In study section, there was a problem because the creeping flow study couldn't be included in the eigenfrequency solver.

How can I use the creeping flow for a fluid which I want and can be used for a liquid in a microcapillary?

The most important thing is the eigenfrequency.
1 Reply Last Post 28 sept. 2015, 05:10 UTC−4
Giorgio Carta
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Posted: 9 years ago 28 sept. 2015, 05:10 UTC−4
Dear JeeWon,

I had the same problem and I struggled a lot to find a solution.
I asked the support, and they suggested to use the physics Linearized Navier-Stokes, Frequency Domain, under Acoustics->Aeroacoustics. In this way, it is possible to calculate the eigenfrequencies of a solid interacting with a fluid.
I am using the 5.1 version, I do not know if the older versions have this module.

I hope this helps.
Giorgio
Dear JeeWon, I had the same problem and I struggled a lot to find a solution. I asked the support, and they suggested to use the physics Linearized Navier-Stokes, Frequency Domain, under Acoustics->Aeroacoustics. In this way, it is possible to calculate the eigenfrequencies of a solid interacting with a fluid. I am using the 5.1 version, I do not know if the older versions have this module. I hope this helps. Giorgio

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