The influence of key factors on the heat and mass transfer of a sessile droplet

The influence of key factors on the heat and mass transfer of a sessile droplet

Bibliografiska uppgifter
Parent link:Experimental Thermal and Fluid Science
Vol. 99.— 2018.— [P. 59-70]
Institutionell upphovsman: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Övriga upphovsmän: Volkov R. S. Roman Sergeevich, Strizhak P. A. Pavel Alexandrovich, Misyura S. Ya. Sergey Yakovlevich, Lezhnin S. I. Sergey Ivanovich, Morozov V. S. Vladimir Sergeevich
Sammanfattning:Title screen
Heat transfer, temperature and velocity fields of droplets of water and aqueous salt solutions have been studied. The initial concentration of salt solutions C01 = 30% in accordance with advanced technological applications. It is shown that the heat flux q for a water droplet is several times higher than for salt solutions. During the droplet evaporation, this difference increases, since q for aqueous salt solutions is many times reduced. While maintaining the wall temperature under the drop quasi-constant (Tw = 83 °C), the heat transfer coefficient α(for the time t < 150 s) for a drop of water 1.5-2 times exceeds α for the salt solution, and is 7 times higher for water than for the salt solution at t = 280 s. Using PIV measurements the liquid velocity fields have been obtained; and for the first time it has been shown that only for very small times and at high ΔT, the important role is played by thermo-gravitational convection in the droplet (the Rayleigh number Ra). But already for t > 10 s, the thermal and solutal Marangoni flows have a greater influence on the flow in a drop of the salt solution.
Режим доступа: по договору с организацией-держателем ресурса
Språk:engelska
Publicerad: 2018
Ämnen:
электронный ресурс
труды учёных ТПУ
растворы
температура
теплопередача
Länkar:https://doi.org/10.1016/j.expthermflusci.2018.07.010
Materialtyp: Elektronisk Bokavsnitt
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=658933

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