Bulletin of the American Physical Society
63rd Annual Meeting of the APS Division of Fluid Dynamics
Volume 55, Number 16
Sunday–Tuesday, November 21–23, 2010; Long Beach, California
Session RM: Free Surface Flows: Interfacial Phenomena
3:05 PM–4:49 PM,
Tuesday, November 23, 2010
Long Beach Convention Center
Room: 202B
Chair: Rouslan Krechetnikov, University of California, Santa Barbara
Abstract ID: BAPS.2010.DFD.RM.7
Abstract: RM.00007 : Experimental results on evaporation waves*
4:23 PM–4:36 PM
Preview Abstract
Abstract
Authors:
Jose Grana Otero
(School of Aeronautics (UPM))
Ignacio Parra Fabian
(School of Aeronautics (UPM))
A liquid contained in a vertical glass tube is suddenly depressurized from a high initial pressure down to one for which the stable state is vapour, so vaporization sets off at the free surface. For large enough evaporation rates, the planar vapour-liquid interface is Darrieus-Landau unstable [1], leading to the interface surface rippling close to the instability threshold. Further increasing the initial to final pressure ratio brings about evaporation waves [2,3], in which a highly corrugated front propagates downwards into the liquid. A new experimental method is presented as well as some experimental results obtained by tracking the evolution of the front with a high speed camera. In addition, a number of new phenomena related to the dynamics of bubbles growth at the walls has been uncovered. In particular, a new mode of propagation of the evaporation front is found. In this mode the front originates from below the interface, so the propagation is upwards against gravity with a curved but smooth front.\\[4pt] [1] F. J. Higuera, Phys. Fluids, V. 30, 679 (1987).\\[0pt] [2] J.E.Shepherd and B.Sturtevant, J.Fluid Mech., V.121,379 (1982).\\[0pt] [3] P.Reinke and G.Yadigaroglu, Int.J.Multiph. Flow, V.27,1487 (2001).
*This work has been supported by the spanish Ministerio de Ciencia e Innovacion under the project DPI2009-1110.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.DFD.RM.7
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