Abstract
Transverse vibrations can induce the non-linear compression of a thin film of air to levitate objects, via the squeeze-film effect. This phenomenon is well captured by the Reynolds' lubrication theory; however, the same theory fails to describe this levitation when the fluid is incompressible. In this case, the computation predicts no steady-state levitation, contradicting the documented experimental evidence. In this Letter, we uncover the main source of the time-averaged pressure asymmetry in the incompressible fluid thin film, leading the levitation phenomenon to exist. Furthermore, we reveal the physical law governing the steady-state levitation height, which we confirm experimentally.
Original language | English |
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Article number | 241601 |
Number of pages | 6 |
Journal | Applied Physics Letters |
Volume | 122 |
Issue number | 24 |
DOIs | |
Publication status | Published - 2023 |
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Raw data for the paper: Incompressible Squeeze-Film Levitation
Atalla, M. A. A. (Creator), TU Delft - 4TU.ResearchData, 9 Nov 2022
DOI: 10.4121/21523890
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