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Modeling bubble collapse aggressiveness in traveling bubble cavitation using bubble breakup model
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SYSNO ASEP 0388315 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Modeling bubble collapse aggressiveness in traveling bubble cavitation using bubble breakup model Tvůrce(i) Zima, Patrik (UT-L) RID
Sedlář, M. (CZ)Zdroj.dok. Proceedings of the Eighth International Symposium on Cavitation (CAV 2012). - Singapore : Research Publishing Services, 2012 / Ohl C-D. ; Klaseboer E. ; Ohl S. W. ; Gong S. W. ; Khoo B. CH. - ISBN 978-981-07-2826-7 Rozsah stran s. 182-186 Poč.str. 5 s. Forma vydání Tištěná - P Akce International Symposium on Cavitation /8./ CAV 2012 Datum konání 13.08.2012-16.08.2012 Místo konání Singapur Země SG - Singapur Typ akce WRD Jazyk dok. eng - angličtina Země vyd. SG - Singapur Klíč. slova bubble collapse ; traveling bubble cavitation ; numerical modeling Vědní obor RIV BK - Mechanika tekutin CEP GAP101/10/1428 GA ČR - Grantová agentura ČR CEZ AV0Z20760514 - UT-L (2005-2011) DOI 10.3850/978-981-07-2826-7_209 Anotace The paper presents the latest progress in assessing the collapse aggressiveness of cavitation bubbles in near-steady-state flow with traveling bubble cavitation using two-way coupling of the RANS equation and the Rayleigh-Plesset equation. The aggressiveness is determined from the energy dissipated during the collapse. It is assumed that bubbles break up under suitable conditions. The criterion for bubble breakup is based on the linear Rayleigh-Taylor analysis of the spherical bubble surface. The model is tested numerically for a 2D hydrofoil. The bubbles are assumed spherical and their interaction with the solid wall is not considered. Material effects due to cavitation erosion are not studied. The model is implemented in the in-house 3-D solver for turbulent pump flow. The numerical results for the 2D hydrofoil are compared to the erosion patterns obtained on the hydrofoil surface obtained from the cavitation tunnel measurement. Extension to complex 3D geometries, such as pump impellers or nozzles, where the condition of traveling or bubbly cavitation mode is fulfilled, is straightforward. Pracoviště Ústav termomechaniky Kontakt Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Rok sběru 2013
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