Vibration of a Flattened Drop. II. Normal Mode Analysis

Takaki, Ryuji; Adachi, Ken

doi:10.1143/jpsj.54.2462

Cited by 39 publications

(32 citation statements)

References 7 publications

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“…2(a) and is consistent with a quasi-2D dispersion relation. 8 In order to gain insight into the nature of the star-shaped oscillations, we used a pressure sensor (GEMS Sensors) connected to a small, 1 mm hole at the center of the curved aluminum surface to detect pressure variations in the vapor layer directly beneath the drop. Fig.…”

Section: The Many Faces Of a Leidenfrost Dropmentioning

confidence: 99%

The many faces of a Leidenfrost drop

Liétor-Santos

Burton

2015

Physics of Fluids

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Section: The Many Faces Of a Leidenfrost Dropmentioning

confidence: 99%

The many faces of a Leidenfrost drop

Liétor-Santos

Burton

2015

Physics of Fluids

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“…and ∆h = β sin 2πf t + φ ∆h (10) where α and β are the amplitudes of the respective variations. r 0 = mg/pπ, such that when α = 0, F net = β = 0.…”

Section: B Breathing Modementioning

confidence: 99%

Dynamics of the vapor layer below a Leidenfrost drop

Caswell

2014

Phys. Rev. E

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In the Leidenfrost effect a small drop of fluid is levitated above a sufficiently hot surface, on a persistent vapor layer generated by evaporation from the drop. The vapor layer thermally insulates the drop from the surface leading to extraordinarily long drop lifetimes. The top-view shape of the levitated drops can exhibit persistent star-like vibrations. I extend recent work [Burton et al. PRL 2012] to study the bottom surface of the drop using interference-imaging. In this work I use a high-speed camera and automated image analysis to image, locate and classify the interference fringes. From the interference fringes I reconstruct the shape and height profile of the rim where the drop is closest to the surface. I measure the drop-size dependence of the planar vibrational mode frequencies, which agree well with previous work. I observe a distinct breathing mode in the average radius of the drop, the frequency of which scales differently with drop size than the other modes. This breathing mode can be tightly coupled to a vertical motion of the drop. I further observe a qualitative difference in the structure and dynamics of the vertical profile of the rim between large and small drops.

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“…The spontaneous oscillations of puddles on a hot surface were first reported in 1952 by Norman J. Holter [140]. Later various other authors [141,142,143,144,116,145,146,147] studied it in detail. Puddle oscillations are often produced by a periodic acceleration field applied to the droplet.…”

Section: Introductionmentioning

confidence: 94%

“…None of the above mentioned references shows such a substantial deviation in resonance frequencies as we observed experimentally. The experiments with flat droplets found in literature are carried out without sandwiching them between two substrates [141,142,143,144,116,145,146,147] and no deviations in the resonance frequencies are reported. However a theoretical study on cylindrical drop sandwiched between two solid planes reports substantial reduction in the resonance frequencies with increasing hysteresis [149].…”

Section: N=1mentioning

confidence: 99%

Microfluidic flow driven by electric fields

Augustine¹

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Vibration of a Flattened Drop. II. Normal Mode Analysis

Cited by 39 publications

References 7 publications

The many faces of a Leidenfrost drop

The many faces of a Leidenfrost drop

Dynamics of the vapor layer below a Leidenfrost drop

Microfluidic flow driven by electric fields

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