Dynamics of mono-size aerosolized liquid fuel detonations

Brown, Taylor; Hytovick, Rachel; Berson, Joshua; Burke, Robert; Salauddin, Sheikh; Ahmed, Kareem

doi:10.1016/j.proci.2024.105416

Proceedings of the Combustion Institute

2024

DOI: 10.1016/j.proci.2024.105416

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Dynamics of mono-size aerosolized liquid fuel detonations

Taylor Brown,

Rachel Hytovick,

Joshua Berson

et al.

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2024

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Direct observation of small scale capillary wave turbulence using high speed digital holographic microscopy

Connacher,

Orosco,

Schmidt

et al. 2024

Front. Acoust.

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IntroductionIt is now known that capillary waves driven upon a fluid interface by high frequency (>1 MHz) ultrasound exhibit capillary wave turbulence: the appearance of waves with phase and wavelength far removed from the excitation signal that drives them. These waves are responsible in significant part for atomization, a useful application for ultrasound, though the physics responsible for their appearance is poorly understood.MethodsWe use high-speed digital holographic microscopy to observe these capillary waves, an important step towards understanding their generation and atomization phenomena.ResultsWe observe Zakharov-Kolmogorov weak wave turbulence for a limited range of input power, and find broader turbulence phenomena outside this range. We see discrete thresholds as the input power is increased, where higher and higher frequency responses are driven in the capillary waves with sudden onset between regimes.DiscussionWe employed spatial analysis to find extensions of the capillary wave response to higher frequencies, suggesting there is additional information in the spatial distribution of the capillary wave that is rarely if ever measured. We verified via frequency modulation that nonlinear resonance broadening is present, which undermines the use of Faraday wave or parametric wave theories to characterize these waves, important in the context of atomization which is now, definitively, not a Faraday wave process.

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Direct observation of small scale capillary wave turbulence using high speed digital holographic microscopy

Connacher,

Orosco,

Schmidt

et al. 2024

Front. Acoust.

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Dynamics of mono-size aerosolized liquid fuel detonations

Cited by 1 publication

References 29 publications

Direct observation of small scale capillary wave turbulence using high speed digital holographic microscopy

Direct observation of small scale capillary wave turbulence using high speed digital holographic microscopy

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