Apparatus for investigation of evaporation at free liquid–vapour interfaces

Попов, С. А.; Melling, A.; Durst, F.; Ward, C. A.

doi:10.1016/j.ijheatmasstransfer.2004.10.038

Cited by 45 publications

(25 citation statements)

References 19 publications

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“…2a. While the evaporation effect was dominant in this case, more heat was absorbed from liquid than vapor due to the big thermal conductivity in liquid, which resulted in a temperature discontinuity with the interfacial temperature in vapor greater than that in the liquid by 0.28 • C. It is noted that same temperature discontinuity trends were both found in Popov's (2005) and Ward's (2001) experiments, which they inferred that condensation took place at the interface to release heat to the vapor phase after long-time stabilizing due to the relatively low liquid temperature. While in present experiments, the liquid temperatures were controlled to be always bigger than the vapor temperature, which means no condensation occurring at the vapor-liquid interface.…”

Section: Resultsmentioning

confidence: 54%

Interfacial Temperature Discontinuities in a Thin Liquid Layer during Evaporation

Zhu

Liu

2013

Microgravity Sci. Technol.

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Recent measurements of the temperature profiles across the liquid-vapor interface of a steady evaporating liquid were performed in a thin planar liquid layer subjected to externally imposed horizontal temperature differences when the interface was open to air. Temperature discontinuities have been found to exist at the interface with an growing tendency as the imposed horizontal temperature difference increasing. Under the co-influence of thermocapillary convection and evaporation effect, a thin layer of 0.5 mm thick with approximate uniform temperature was found just below the liquid-vapor interface. Repeated experiments and further comparisons of the interfacial temperature profiles for different spatial positions along the streamwise center line and varying depths of the liquid layer were also carried out. And the temperature discontinuity was found related to the temperature in liquid phase, which was strongly influenced by the coupling of thermocapillary convection and evaporation effect.

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Section: Resultsmentioning

confidence: 54%

Interfacial Temperature Discontinuities in a Thin Liquid Layer during Evaporation

Zhu

Liu

2013

Microgravity Sci. Technol.

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“…Studies of evaporation were started by Hertz 1 and subsequently a large number of experimental, [2][3][4][5][6][7][8][9][10][11][12][13][14] theoretical, [15][16][17][18][19][20] and molecular simulation [21][22][23][24][25][26][27][28][29] works as well as review articles [30][31][32] and books [33][34][35][36][37] appeared of which only some are cited here. Despite these efforts it still seems that the experimental findings diverge from the existing molecular modelling [17][18][19][20] and simulation [21][22][23][24][25][26][27][28]…”

Section: Introductionmentioning

confidence: 99%

“…A further discussion of that paper 27 is given below. Stimulated by the ideas of Bošnjaković 15 on the heat transport from the bulk liquid region to the interface, experimental studies [3][4][5][6][7][8][9][10][11][12][13][14] were made to determine the length L n and the temperature drop ∆T = T l − T l i . A major difference between experimental work and molecular model calculations, [20][21][22][23][24][25][26][27][28][29] however, is the length of the non-thermostated region L n .…”

Section: Introductionmentioning

confidence: 99%

Communication: Evaporation: Influence of heat transport in the liquid on the interface temperature and the particle flux

Heinen

Vrabec

Fischer³

2016

The Journal of Chemical Physics

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Molecular dynamics simulations are reported for the evaporation of a liquid into vacuum, where a Lennard-Jones type fluid with truncated and shifted potential at 2.5σ is considered. Vacuum is enforced locally by particle deletion and the liquid is thermostated in its bulk so that heat flows to the planar interface driving stationary evaporation. The length of the non-thermostated transition region between the bulk liquid and the interface Ln is under study. First, it is found for the reduced bulk liquid temperature Tl/Tc = 0.74 (Tc is the critical temperature) that by increasing Ln from 5.2σ to 208σ the interface temperature Ti drops by 17% and the evaporation flux decreases by a factor of 4.4. From a series of simulations for increasing values of Ln, an asymptotic value Ti∞ of the interface temperature for Ln → ∞ can be estimated which is 21% lower than the bulk liquid temperature Tl. Second, it is found that the evaporation flux is solely determined by the interface temperature Ti, independent on Tl or Ln. Combining these two findings, the evaporation coefficient α of a liquid thermostated on a macroscopic scale is estimated to be α ≈ 0.14 for Tl/Tc = 0.74.

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“…As to the analysis of thermocapillary convection coupling with evaporation effect in a horizontal thin liquid layer, only preliminary numerical study was performed [18]. Recently, in a special experimental environment, researchers found a big temperature jump at a spherical evaporating interface [19,20]. Yet there are no relevant papers regarding more common experiments in a plane thin evaporating layer.…”

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confidence: 99%

Coupling of thermocapillary convection and evaporation effect in a liquid layer when the evaporating interface is open to air

Zhu

Liu

2010

Chin. Sci. Bull.

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The coupling mechanism of thermocapillary convection and evaporation effect in evaporating liquids was studied experimentally. The experiments were carried out to study a thin evaporating liquid layer in a rectangular test cell when the upper surface was open to air. By altering the imposed horizontal temperature differences and heights of liquid layers, the average evaporating rate and interfacial temperature profiles were measured. The flow fields were also visualized by PIV method. For comparison, the experiments were repeated by use of another two non-evaporating liquids to study the influence of evaporation effect. The results reveal evidently the role that evaporation effect plays in the coupling with thermocapillary convection. thermocapillary convection, evaporation, temperature profile, flow pattern Citation:Zhu Z Q, Liu Q S. Coupling of thermocapillary convection and evaporation effect in a liquid layer when the evaporating interface is open to air.

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Apparatus for investigation of evaporation at free liquid–vapour interfaces

Cited by 45 publications

References 19 publications

Interfacial Temperature Discontinuities in a Thin Liquid Layer during Evaporation

Interfacial Temperature Discontinuities in a Thin Liquid Layer during Evaporation

Communication: Evaporation: Influence of heat transport in the liquid on the interface temperature and the particle flux

Coupling of thermocapillary convection and evaporation effect in a liquid layer when the evaporating interface is open to air

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