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Vortex-Induced Vibrations of an Elastic Micro-Beam with Gas Modeled by DSMC
Kiril Shterev1,2, Emil Manoach1, Simona Doneva1
1Institute of Mechanics, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria.
Sensors (Basel, Switzerland)
|February 28, 2023
Summary
Fluid-structure interaction in rarefied gas flow can cause resonance-like phenomena in elastic beams. This vibration coupling may offer new possibilities for high-technology applications.
Area of Science:
- Fluid mechanics
- Solid mechanics
- Computational physics
Background:
- Fluid-structure interaction (FSI) is a critical coupled problem in mechanics.
- Understanding FSI is vital for numerous high-technology fields.
Purpose of the Study:
- Investigate the specific challenges arising from the interaction between rarefied gas flow and an elastic obstacle.
- Analyze the dynamic behavior of an elastic obstacle under rarefied gas flow conditions.
Main Methods:
- Employed the Direct Simulation Monte Carlo (DSMC) method to accurately model rarefied gas flow dynamics.
- Utilized linear Euler-Bernoulli beam theory to describe the elastic obstacle's motion.
Main Results:
- Observed that gas flow-induced vibrations can lead to a resonance-like phenomenon.
- This phenomenon occurs when the vortex shedding frequency of the gas flow aligns with the natural frequency of the elastic beam.
Conclusions:
- The study highlights a significant coupling effect between rarefied gas flow and elastic structures.
- The identified resonance-like phenomenon presents potential utility in advanced technological applications.
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