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- W4299395608 abstract "Sessile drops of soft hydrogels were vibrated vertically by subjecting them to a mechanically induced Gaussian white noise. Power spectra of the surface fluctuation of the gel allowed identification of its resonant frequency that decreases with their mass, but increases with its shear modulus. The principal resonant frequencies of the spheroidal modes of the gel of shear moduli ranging from 55 Pa to 290 Pa were closest to the lowest Rayleigh mode of vibration of a drop of pure water. These observations coupled with the fact that the resonance frequency varies inversely as the square root of the mass in all cases suggest that they primarily correspond to the capillary (or a pseudo-capillary) mode of drop vibration. The contact angles of the gel drops also increase with the modulus of the gel. When the resonance frequencies are corrected for the wetting angles, and plotted against the fundamental frequency scale (gamma/mu)^0.5, all the data collapse nicely on a single plot provided that the latter is shifted by a shear modulus dependent factor (1+mu.L/gamma). A length scale L, independent of both the modulus and the mass of the drop emerges from such a fit." @default.
- W4299395608 created "2022-10-02" @default.
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- W4299395608 date "2014-10-08" @default.
- W4299395608 modified "2023-09-29" @default.
- W4299395608 title "Vibrations of Sessile Drops of Soft Hydrogels" @default.
- W4299395608 doi "https://doi.org/10.48550/arxiv.1410.2210" @default.
- W4299395608 hasPublicationYear "2014" @default.
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