Abstract
| Language | English |
|---|---|
| Pages | 4262-4272 |
| Number of pages | 11 |
| Journal | Physics of Fluids |
| Volume | 16 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 30 Apr 2004 |
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Keywords
- unstable convection
- droplet dissolving
- liquid/liquid system
- miscibility gap
- liquid metals
- convection
- Marangoni convection
- fluid drops
- organic liquids
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Higher modes of mixed buoyant-Marangoni unstable convection originated from a droplet dissolving in a liquid/liquid system with miscibility gap. / Lappa, Marcello; Piccolo, Chiara .
In: Physics of Fluids, Vol. 16, No. 12, 30.04.2004, p. 4262-4272.Research output: Contribution to journal › Article
TY - JOUR
T1 - Higher modes of mixed buoyant-Marangoni unstable convection originated from a droplet dissolving in a liquid/liquid system with miscibility gap
AU - Lappa, Marcello
AU - Piccolo, Chiara
PY - 2004/4/30
Y1 - 2004/4/30
N2 - Some phenomena, never observed before, concerning a system composed by two organic-liquid bi-component phases with a miscibility gap, used as transparent surrogates for immiscible metal alloys, are discussed and elucidated in the framework of experimental analyses and numerical simulations. It is shown that a single dissolving droplet at the bottom of a test cell behaves as an intriguing pattern-forming dynamical system leading to a wealth of different spatio-temporal modes of convection when the imposed temperature gradient is increased. The last part of the analysis is devoted to comparison with other similar phenomena (the flow instability pertaining to the Marangoni flow around bubbles surrounded by a liquid heated from above, and the case of rising buoyant jets), showing analogies and differences. Such a comparison is also used as a means to focus on the intrinsic nature of the present instability.
AB - Some phenomena, never observed before, concerning a system composed by two organic-liquid bi-component phases with a miscibility gap, used as transparent surrogates for immiscible metal alloys, are discussed and elucidated in the framework of experimental analyses and numerical simulations. It is shown that a single dissolving droplet at the bottom of a test cell behaves as an intriguing pattern-forming dynamical system leading to a wealth of different spatio-temporal modes of convection when the imposed temperature gradient is increased. The last part of the analysis is devoted to comparison with other similar phenomena (the flow instability pertaining to the Marangoni flow around bubbles surrounded by a liquid heated from above, and the case of rising buoyant jets), showing analogies and differences. Such a comparison is also used as a means to focus on the intrinsic nature of the present instability.
KW - unstable convection
KW - droplet dissolving
KW - liquid/liquid system
KW - miscibility gap
KW - liquid metals
KW - convection
KW - Marangoni convection
KW - fluid drops
KW - organic liquids
U2 - 10.1063/1.1808372
DO - 10.1063/1.1808372
M3 - Article
VL - 16
SP - 4262
EP - 4272
JO - Physics of Fluids
T2 - Physics of Fluids
JF - Physics of Fluids
SN - 1070-6631
IS - 12
ER -