Oscillatory Motion of a Droplet Cluster

Oscillatory Motion of a Droplet Cluster

Horizontal oscillations of small droplet clusters (from one to four droplets) levitating over a locally heated water layer in upward vapor–air flow are investigated experimentally. These oscillations are caused by a complex dynamic interaction between the droplets and the nonsteady gas flow. The pat...

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Veröffentlicht in:Journal of physical chemistry. C 2019-09, Vol.123 (38), p.23572-23576
Hauptverfasser: Fedorets, Alexander A, Aktaev, Nurken E, Gabyshev, Dmitrii N, Bormashenko, Edward, Dombrovsky, Leonid A, Nosonovsky, Michael
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container_end_page 23576
container_issue 38
container_start_page 23572
container_title Journal of physical chemistry. C
container_volume 123
creator Fedorets, Alexander A
Aktaev, Nurken E
Gabyshev, Dmitrii N
Bormashenko, Edward
Dombrovsky, Leonid A
Nosonovsky, Michael
description Horizontal oscillations of small droplet clusters (from one to four droplets) levitating over a locally heated water layer in upward vapor–air flow are investigated experimentally. These oscillations are caused by a complex dynamic interaction between the droplets and the nonsteady gas flow. The path of the center of the droplet cluster is similar to a random walk in a potential well. The vibrational spectra of clusters’ centers obtained by Fourier analysis showed several frequency peaks between f = 1.61 and 5.96 Hz found in all clusters, which shows that the cluster tends to oscillate as a whole. The possibility of decoupling of the aerodynamic interaction between the gas flow and the droplets and the interaction between individual droplets is discussed.
doi_str_mv 10.1021/acs.jpcc.9b08194
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title Oscillatory Motion of a Droplet Cluster
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