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- W2077359166 abstract "A liquid bridge between two solid surfaces, known as a capillary bridge, has applications in low gravity such as the solidification of floating zones. Long bridges are naturally unstable to a symmetric mode where a region adjacent to one end bulges while the opposite end thins. For a cylindrical bridge of radius R and length L, the slenderness S=L/2R has a natural (Rayleigh) limit of π beyond which the bridge breaks. It is proposed here to stabilize dense bridges at a velocity antinode of a standing acoustic wave perpendicular to the bridge axis. Let 〈pr〉 denote the angular average of the radiation pressure over the surface of a cylindrical bridge. It is necessary to select the acoustic frequency such that 〈pr〉 increases with R so that a bulge is automatically squeezed by the increased radiation pressure. Linearized analysis of the stability indicates S may be extended beyond π: Smax depends on q=(R2/γ)d〈pr〉/dR, where γ is the surface tension and Smax diverges as q approaches unity. The analysis supports the possibility of passive acoustic stabilization of capillary breakup in low gravity. The one-dimensional inviscid slice approximation is used in the analysis of axisymmetric deformations. [Work supported by NASA.]" @default.
- W2077359166 created "2016-06-24" @default.
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- W2077359166 date "1995-05-01" @default.
- W2077359166 modified "2023-09-24" @default.
- W2077359166 title "Capillary bridge stability in an acoustic standing wave: Linearized analysis of passive stabilization with radiation pressure" @default.
- W2077359166 doi "https://doi.org/10.1121/1.412616" @default.
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