Modeling the vibration of microbubbles in Thermoviscous Acoustics

Ali Kheirkhah Barzoki

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Hello,

I am trying to simulate the acoustic streaming around a microbubble under acoustic actuation. To do so, I coupled Pressure Acoustics with Thermoviscous Acoustics and defined surface tension at the bubble interface. First, I did Eigen study and found the resonant frequency. Then, I did frequency domain study at the resonant frequency I found, and use the results of the frequency domain study in a stationary study for Laminar flow to see the acoustic streaming. The problem is that the simulation result doesn't match the experiments. When I check the mode shapes of the bubble interface in Eigen study and Frequency domain study, they are not the same, while I think they must be the same because they are at the same frequency.

Can somebody help me with this contradiction?

Best, Ali


1 Reply Last Post 21 nov. 2025, 02:12 UTC−5
Acculution ApS Certified Consultant

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Posted: 1 hour ago 21 nov. 2025, 02:12 UTC−5

Don't know anything about bubbles, or why the experiment data does not fit with the modeled data, but in general I would not expect the eigenshape to 'look' the same as the forced response, unless it is forced in a very particular way, even at the same frequency.

-------------------
René Christensen, PhD
Acculution ApS
www.acculution.com
info@acculution.com
Don't know anything about bubbles, or why the experiment data does not fit with the modeled data, but in general I would not expect the eigenshape to 'look' the same as the forced response, unless it is forced in a very particular way, even at the same frequency.

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