Oscillatory Motion of a Droplet Cluster

Fedorets, Alexander A.; Aktaev, Nurken E.; Gabyshev, D. N.; Bormashenko, Edward; Dombrovsky, Leonid A.; Nosonovsky, Michael

doi:10.1021/acs.jpcc.9b08194

Cited by 18 publications

(15 citation statements)

References 18 publications

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“…[ 29 ] 4) Electric field (EL) method: electric field improves the order of water molecule structure, increases the distance between molecules, and reduces the volume of water clusters. [ 30–32 ] However, the corona wind of the traditional electrostatic field threatens the health of the wearer. [ 33,34 ] Obviously, these four methods of changing the structure of water clusters are not suitable for the human body.…”

Section: Figurementioning

confidence: 99%

Wicking–Polarization‐Induced Water Cluster Size Effect on Triboelectric Evaporation Textiles

et al. 2021

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Sweating during exercise, physical labor, or hot weather leads to a feeling of discomfort. The stuffiness, stickiness, and heaviness brought by sweat may promote negative emotions or disease. Clothing, textiles, and wearable devices exacerbate these problems by restricting evaporation of sweat. Here, a textile that can promote and enhance sweat evaporation by coupling wicking and polarization is reported. The wicking is produced by the wettability gradient and pore size, which make the surface moisture content of the textile in contact with the skin strictly 0%. The polarization is driven by a ferroelectric‐enhanced triboelectric textile. This textile degrades large‐sized water clusters into small‐sized water clusters or water monomers, so that the textiles have an excellent moisture evaporation rate (4.4 and 3.6 times faster than the cotton and polyester textiles, respectively). This work provides a new source of inspiration for quick‐drying textiles and also finds an attractive application for triboelectric technology.

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Section: Figurementioning

confidence: 99%

Wicking–Polarization‐Induced Water Cluster Size Effect on Triboelectric Evaporation Textiles

et al. 2021

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“…Lim et al (2019) reported the transitions from sticky to ergodic configurations in six-particle and seven-particle systems of hard spheres. Fedorets et al (2019b) studied small oscillations of a microdroplet cluster levitating in an ascending vapor stream and found that the cluster tends to oscillate as a whole.…”

Section: Discussionmentioning

confidence: 99%

Allometric scaling law and ergodicity breaking in the vascular system

Nosonovsky

Roy

2020

Microfluid Nanofluid

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Allometry or the quantitative study of the relationship of body size to living organism physiology is an important area of biophysical scaling research. The West-Brown-Enquist (WBE) model of fractal branching in a vascular network explains the empirical allometric Kleiber law (the ¾ scaling exponent for metabolic rates as a function of animal's mass). The WBE model raises a number of new questions, such as how to account for capillary phenomena more accurately and what are more realistic dependencies for blood flow velocity on the size of a capillary. We suggest a generalized formulation of the branching model and investigate the ergodicity in the fractal vascular system. In general, the fluid flow in such a system is not ergodic, and ergodicity breaking is attributed to the fractal structure of the network. Consequently, the fractal branching may be viewed as a source of ergodicity breaking in biophysical systems, in addition to such mechanisms as aging and macromolecular crowding. Accounting for non-ergodicity is important for a wide range of biomedical applications where long observations of time series are impractical. The relevance to microfluidics applications is also discussed.

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“…An experimentally observed droplet cluster levitates in the center of the low-pressure region bounded by a local heating spot. The pressure is higher on the rim of this region rather than in its center so that the cluster is locked in a potential well (Fedorets et al 2019a;Aktaev et al 2018). Inside this well, the air humidity changes with height above the water surface.…”

Section: Diffusional Termmentioning

confidence: 97%

“…Likewise, under natural conditions, the laboratory droplets fall at a terminal velocity relative to the surrounding air. Besides the sedimentation flow, the droplets are almost motionless, yet creating microscopic turbulences leading to small, virtually random vibrational motions (Fedorets et al 2019a). The experimental setup has proven useful to study the impact of external electrical fields on the condensational growth of such droplets (Gabyshev et al 2019;Fedorets et al 2019b;Fedorets et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Condensational growth of water droplets in an external electric field at different temperatures

Gabyshev

Fedorets

Klemm

2020

Aerosol Science and Technology

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The condensational growth of water droplets in technical and natural systems varies with environmental conditions such as droplet size, droplet composition, air humidity, temperature, and turbulence. This contribution addresses the influence of external electrical fields on the condensation process. Although electrical fields exist in the atmosphere, for example in thunderstorm clouds, and although it is generally accepted that electrical fields exert an influence on the condensation process, no quantitative description of this influence at ambient temperatures exists. We present laboratory experiments and a theoretical model to further develop understanding of the influence of electric fields on condensation at various temperatures. The levitated droplet cluster technology is applied to study the kinetics of droplet growth in an external electric field at temperatures between 50 C and 70 C. The theoretical model is designed to mirror the experimental conditions as precisely as possible. Experimental and kinetic model results are in qualitative agreement in that the relative contribution of the electrically induced contribution to total condensation reduces with increasing temperature. Vice versa, the electrically induced condensation significance is expected to further increase with decreasing temperatures below 50 C. We expect that electrocondensation will be the dominating process at room temperatures and even more at temperatures near 0 C, at electric field strengths typical for clouds. Further studies are needed to extend the experimental and theoretical temperature range to conditions typical for clouds in the atmosphere.

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Oscillatory Motion of a Droplet Cluster

Cited by 18 publications

References 18 publications

Wicking–Polarization‐Induced Water Cluster Size Effect on Triboelectric Evaporation Textiles

Wicking–Polarization‐Induced Water Cluster Size Effect on Triboelectric Evaporation Textiles

Allometric scaling law and ergodicity breaking in the vascular system

Condensational growth of water droplets in an external electric field at different temperatures

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