Počet záznamů: 1
Breakup of Bubbles in a Turbulent Flow: Number of Daughter Particles and Their Size Distribution.
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SYSNO ASEP 0496932 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV Záznam nebyl označen do RIV Název Breakup of Bubbles in a Turbulent Flow: Number of Daughter Particles and Their Size Distribution. Tvůrce(i) Vejražka, Jiří (UCHP-M) RID, ORCID, SAI
Zedníková, Mária (UCHP-M) RID, ORCID, SAI
Stanovský, Petr (UCHP-M) RID, ORCID, SAIZdroj.dok. Book of Abstracts. - -, 2017 - ISBN N. Poč.str. 1 s. Forma vydání Nosič - C Akce International Workshop on Bubble and Drop Interfaces (B&D 2017) /7./ Datum konání 26.06.2017 - 30.06.2017 Místo konání Lyon Země FR - Francie Typ akce EUR Jazyk dok. eng - angličtina Země vyd. FR - Francie Klíč. slova bubble breakup ; size distribution ; turbulent flow Vědní obor RIV CI - Průmyslová chemie a chemické inženýrství Obor OECD Chemical process engineering CEP GA15-15467S GA ČR - Grantová agentura ČR Institucionální podpora UCHP-M - RVO:67985858 Anotace The breakup of air bubbles in a turbulent flow of water is studied experimentally. Water flows from an array of coaxial nozzles, generating intensive turbulence, and then flows downward through an experimental cell. Bubbles (1.8 to 5 mm) are injected in the bottom part of the cell and rise towards region with more intensive turbulence, where they break. The breakup events are recorded by means of a high-speed camera. The velocity field in the cell is measured by PIV. The local dissipation rate is estimated using large-eddy PIV technique. From recorded movies, breakup frequency, number of daughter bubbles is determined and their size distribution is established. Mean number of daughter bubbles depends mostly on the breakup Weber number (We). Breakups are observed for We exceeding 0.5, though they are rare at this low We. Till about We ≈ 2, most breakups are binary; then the mean number of daughters increases.
Pracoviště Ústav chemických procesů Kontakt Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Rok sběru 2019
Počet záznamů: 1