000219718 001__ 219718 000219718 005__ 20181203024309.0 000219718 0247_ $$2doi$$a10.1063/1.4949354 000219718 022__ $$a1070-6631 000219718 02470 $$2ISI$$a000377709500008 000219718 037__ $$aARTICLE 000219718 245__ $$aSimulation of bubble expansion and collapse in the vicinity of a free surface 000219718 260__ $$bAmer Inst Physics$$c2016$$aMelville 000219718 269__ $$a2016 000219718 300__ $$a17 000219718 336__ $$aJournal Articles 000219718 500__ $$aFNS ; Flash and Splash 000219718 520__ $$aThe present paper focuses on the numerical simulation of the interaction of laser-generated bubbles with a free surface, including comparison of the results with instances from high-speed videos of the experiment. The Volume Of Fluid method was employed for tracking liquid and gas phases while compressibility effects were introduced with appropriate equations of state for each phase. Initial conditions of the bubble pressure were estimated through the traditional Rayleigh Plesset equation. The simulated bubble expands in a non-spherically symmetric way due to the interference of the free surface, obtaining an oval shape at the maximum size. During collapse, a jet with mushroom cap is formed at the axis of symmetry with the same direction as the gravity vector, which splits the initial bubble to an agglomeration of toroidal structures. Overall, the simulation results are in agreement with the experimental images, both quantitatively and qualitatively, while pressure waves are predicted both during the expansion and the collapse of the bubble. Minor discrepancies in the jet velocity and collapse rate are found and are attributed to the thermodynamic closure of the gas inside the bubble. Published by AIP Publishing. 000219718 6531_ $$aFNS 000219718 6531_ $$aFlash and Splash 000219718 700__ $$uCity Univ London, Northampton Sq, London EC1V 0HB, England$$aKoukouvinis, P. 000219718 700__ $$uCity Univ London, Northampton Sq, London EC1V 0HB, England$$aGavaises, M. 000219718 700__ $$0247876$$g238857$$uEPFL LMH, Ave Cour 33 Bis, CH-1007 Lausanne, Switzerland$$aSupponen, O. 000219718 700__ $$uEPFL LMH, Ave Cour 33 Bis, CH-1007 Lausanne, Switzerland$$aFarhat, M.$$g123870$$0240473 000219718 773__ $$j28$$tPhysics Of Fluids$$k5$$q052103 000219718 909C0 $$xU10309$$0252135$$pLMH 000219718 909CO $$pSTI$$particle$$ooai:infoscience.tind.io:219718 000219718 917Z8 $$x123870 000219718 917Z8 $$x123870 000219718 937__ $$aEPFL-ARTICLE-219718 000219718 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL 000219718 980__ $$aARTICLE