Fine structure of the vapor field in evaporating dense sprays

Fine structure of the vapor field in evaporating dense sprays Making use of an original technique which permits the simultaneous measurement of both the displacement field of evaporating droplets in a spray, and of their vapor, we investigate the relevance of a scenario introduced earlier to describe the evaporation dynamics of dense sprays [Phys. Rev. Fluids 1, 014201 (2016)2469-990X10.1103/PhysRevFluids.1.014201]. A plume of dense acetone droplets evaporating in air is studied, for which the stirring field is measured by particle image velocimetry of the droplets, and the vapor field is imaged quantitatively by laser-induced fluorescence. We show, thanks to these unique in situ measurements, that the spray boundary with the diluting environment is slaved at the dynamics of its saturating vapor concentration field, whose structure is analyzed for different well defined local flow topologies. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review Fluids American Physical Society (APS)

Fine structure of the vapor field in evaporating dense sprays

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Fine structure of the vapor field in evaporating dense sprays

Abstract

Making use of an original technique which permits the simultaneous measurement of both the displacement field of evaporating droplets in a spray, and of their vapor, we investigate the relevance of a scenario introduced earlier to describe the evaporation dynamics of dense sprays [Phys. Rev. Fluids 1, 014201 (2016)2469-990X10.1103/PhysRevFluids.1.014201]. A plume of dense acetone droplets evaporating in air is studied, for which the stirring field is measured by particle image velocimetry of the droplets, and the vapor field is imaged quantitatively by laser-induced fluorescence. We show, thanks to these unique in situ measurements, that the spray boundary with the diluting environment is slaved at the dynamics of its saturating vapor concentration field, whose structure is analyzed for different well defined local flow topologies.
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Publisher
The American Physical Society
Copyright
Copyright © ©2017 American Physical Society
eISSN
2469-990X
D.O.I.
10.1103/PhysRevFluids.2.074501
Publisher site
See Article on Publisher Site

Abstract

Making use of an original technique which permits the simultaneous measurement of both the displacement field of evaporating droplets in a spray, and of their vapor, we investigate the relevance of a scenario introduced earlier to describe the evaporation dynamics of dense sprays [Phys. Rev. Fluids 1, 014201 (2016)2469-990X10.1103/PhysRevFluids.1.014201]. A plume of dense acetone droplets evaporating in air is studied, for which the stirring field is measured by particle image velocimetry of the droplets, and the vapor field is imaged quantitatively by laser-induced fluorescence. We show, thanks to these unique in situ measurements, that the spray boundary with the diluting environment is slaved at the dynamics of its saturating vapor concentration field, whose structure is analyzed for different well defined local flow topologies.

Journal

Physical Review FluidsAmerican Physical Society (APS)

Published: Jul 20, 2017

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