Počet záznamů: 1
Interaction of a bubble with a vortex-ring in the presence of surfactants
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SYSNO ASEP 0573995 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV Záznam nebyl označen do RIV Název Interaction of a bubble with a vortex-ring in the presence of surfactants Tvůrce(i) Zedníková, Mária (UCHP-M) RID, ORCID, SAI
Semlerová, Tereza (UCHP-M)
Tihon, Jaroslav (UCHP-M) RID, ORCID, SAI
Trávníčková, Tereza (UCHP-M) RID, ORCID, SAI
Havlica, Jaromír (UCHP-M) RID, ORCID, SAI
Orvalho, Sandra (UCHP-M) RID, ORCID, SAIČíslo článku 441 Zdroj.dok. Program Booklet. - Kobe : -, 2023 Rozsah stran s. 26 Poč.str. 2 s. Forma vydání Online - E Akce International Conference on Multiphase Flow /11./ Datum konání 02.04.2023 - 07.04.2023 Místo konání Kobe Země JP - Japonsko Typ akce EUR Jazyk dok. eng - angličtina Země vyd. JP - Japonsko Klíč. slova bubble breakup ; vortex flow ; surfactants ; bubble deformation Obor OECD Chemical process engineering CEP GA22-29605S GA ČR - Grantová agentura ČR Institucionální podpora UCHP-M - RVO:67985858 Anotace The study of bubble – vortex-ring interaction is based on experimental visualization of a single bubble interacting with a single vortex-ring generated in liquid. The design of the experiment enables the control of both the vortex-ring inertia and the bubble size. A high-speed camera is used to record the whole interaction process: the initial free rise of mother bubble, then the interaction of the bubble with the vortex-ring, bubble deformations, possible breakup and inspecting of all daughter bubbles arising from the breakup. The effect of surfactant is investigated using α-terpineol as model surfactant. Two concentrations of surfactant (1⸱10-3 and 3⸱10-3 mol/L) were investigated. In the presence of surfactant and comparing with pure water, the bubble deformation is supressed and more energy is required to break the bubble. Therefore, the interaction process results in bubble
breakup less frequently. The static surface tension is found to be insufficient to characterise the bubble surface energy; a new scaling of the bubble breakup process is proposed. The dimensionless damping time of bubble shape oscillations is used as a parameter to correct the effect of surface tension in the modified Weber number. This damping time is a measure of energy dissipation at the bubble interface during the shape oscillations and its magnitude differs in pure liquids and in surfactant solutions.
Pracoviště Ústav chemických procesů Kontakt Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Rok sběru 2024
Počet záznamů: 1