Features of the Destruction of a Microjet of a Diluted Polymer Solution into Main and Satellite Microdrops under the Action of an External Vibrational Impact; Technical Physics; Vol. 67, iss. 12

Dettagli Bibliografici
Parent link:	Technical Physics Vol. 67, iss. 12.— 2023.— [P. 779–790]
Enti autori:	Национальный исследовательский Томский политехнический университет Инженерная школа энергетики Научно-образовательный центр И. Н. Бутакова (НОЦ И. Н. Бутакова), Национальный исследовательский Томский политехнический университет Исследовательская школа химических и биомедицинских технологий
Altri autori:	Khomutov N. A. Nikita Andreevich, Semyonova A. E. Aleksandra Evgenjevna, Belonogov M. V. Maxim Vladimirovich, Di Martino A. Antonio, Khan E. A. Elena Alekseevna, Piskunov M. V. Maksim Vladimirovich
Riassunto:	Title screen An experimental study of the morphology of a laminar microjet flow of dilute aqueous solutions of sodium alginate with and without the addition of hydroxyethyl cellulose after a nozzle subjected to external vibration excitation from the action of the inverse piezoelectric effect was carried out. The influence of the polymer concentration in solution (0.5-5 mg/mL), liquid flow rate (4-26 mL/min), and external disturbance current frequency (0-1.2 kHz) on the capillary fragmentation of a microjet with a diameter of about 210 μm in the range of Onesorge numbers from 0.046 to 1.88 and Reynolds numbers from 0.7 to 470 was studied. The regimes of microjet flow and fragmentation into microdrops are identified, indicating the boundaries of transitions between them, and a general map of regimes is constructed. Taking into account the concentration of the polymer in the solution, the dependence of the length of destruction of the microjet on its velocity is shown. The conditions for monodisperse destruction of a microjet with an equidistant location of the main microdrops in the flow are established, which are related to the optimal balance between the molecular weight of the polymer in solution, the intensity of the external perturbation, and the stress relaxation time in polymer viscoelastic microjets. The role of the formation of “beads-on-string” structures in the capillary destruction of a microjet has been studied with the identification of cases of the absence of the formation of satellite microdrops from liquid filaments between the main microdroplets. The results obtained are of practical importance for applications based on air microhydrodynamics (bioengineering and additive technologies), which work based on heterogeneous fluids. Режим доступа: по договору с организацией-держателем ресурса
Lingua:	inglese
Pubblicazione:	2023
Soggetti:	электронный ресурс труды учёных ТПУ Rayleigh–Plato instability inverse piezoelectric effect monodisperse breaking stress relaxation time microjet flow
Accesso online:	https://doi.org/10.1134/S1063784222110056
Natura:	Elettronico Capitolo di libro
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=669266