Interaction of Levitating Microdroplets with Moist Air Flow in the Contact Line Region

Kabov, Oleg; Зайцев, Д. В.; Kirichenko, Dmitry P.; Ajaev, Vladimir S.

doi:10.1080/15567265.2017.1279249

Cited by 50 publications

(22 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These droplets continue to grow by condensation and move down under the action of gravity. At some point, the Stefan flow balances gravity and the droplets end up levitating over the surface, often forming large ordered arrays moving over the interface in a random fashion (Kabov et al, 2017). A top view of such array is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

“…When the array ends up in a vicinity of the contact line, the individual droplets move down the interface slope under the action of gravity and then encounter strong moist air flow near the contact line. It has been suggested that analysis of motion of such droplets in the vicinity of a contact line can be used for determination of local moist air flow velocity and some preliminary results have been reported (Kabov et al, 2017), but they were limited to analysis of just one trajectory and moist air velocity only in the narrow region near the contact line. The objective of the present article is to conduct a systematic comprehensive study of flow structure near the contact line by means of trajectory analysis of microscale droplets moving over the contact line region.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of Moist Air Flow Near Contact Line Using Microdroplets as Tracers

Kabov

Зайцев

Kirichenko

et al. 2016

Interfac Phenom Heat Transfer

Self Cite

View full text Add to dashboard Cite

We study the trajectories of levitating microscale droplets of water in the vicinity of a contact line which is the boundary of a dry patch in a liquid layer on a heated horizontal substrate. Droplets initially form by condensation and move under the action of gravity, buoyancy, and Stokes drag force which depends on the moist air velocity. The time-dependent data on the droplet trajectories are used to obtain detailed information on the steady air velocity distributions near the contact line. An increase in the flow velocity is observed in the immediate vicinity of the contact line and explained in terms of local increase in evaporation rates. Velocity profiles are compared at different substrate temperatures.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of Moist Air Flow Near Contact Line Using Microdroplets as Tracers

Kabov

Зайцев

Kirichenko

et al. 2016

Interfac Phenom Heat Transfer

Self Cite

View full text Add to dashboard Cite

show abstract

“…Modern technologies commonly use the droplet evaporation. Evaporation of a drop and liquids were studied in [4][5][6][7][8][9][10][11][12][13][14]. Gas-droplet-particles flows are used in an energy sector and allow to solve environmental issues [6].…”

Section: Introductionmentioning

confidence: 99%

Droplet desorption modes at high heat flux

Misyura

Meleshkin

2019

EPJ Web Conf.

View full text Add to dashboard Cite

Nonisothermal droplet desorption of aqueous salt solution H 2 O/LiBr during nucleate boiling was studied experimentally. A droplet was placed on a horizontal heated wall. The initial concentration of salt C 0 = 25 %. The wall temperature T w = 120 ºC and ambient air pressure is 1 bar. Thermal images of the temperature field on the droplet surface show an extremely non-uniform temperature field. At nucleate boiling in LiBr salt solution it is incorrect to predict the desorption behavior in stationary approximation. It was previously believed that the rate of evaporation does not vary with time. For the first time it is shown that the desorption rate is divided into several characteristic time intervals. These intervals is characterized by a significant change in the desorption rate.

show abstract

“…The term "contact line" is often used for the latter situation even though the true contact of the fluid interface with the solid wall is not achieved; some authors prefer the term "apparent contact line" to describe this situation. In [13][14], the behavior of levitating droplets was studied when they transit from hot liquid interface to dry area. It was found that when approaching the contact line, the droplet levitation height increases several times, which indicates the existence of intense evaporation in the region of the contact line.…”

Section: Introductionmentioning

confidence: 99%

Levitation of liquid microdroplets over a dry heated substrate near triple-phase contact line

2018

View full text Add to dashboard Cite

Levitating droplets of liquid condensate are known to organize themselves into ordered arrays over hot liquid-gas interfaces. We report experimental observation of similar behaviour over a dry heated substrate in the vicinity of the triple-phase contact line with high local evaporation rate. It was found that there is an area near the contact line, where no levitating droplets are observed. The width of this area increases with the substrate temperature. Also, it was found that the distance between adjacent levitating droplets increases with the temperature.

show abstract

Interaction of Levitating Microdroplets with Moist Air Flow in the Contact Line Region

Cited by 50 publications

References 12 publications

Investigation of Moist Air Flow Near Contact Line Using Microdroplets as Tracers

Investigation of Moist Air Flow Near Contact Line Using Microdroplets as Tracers

Droplet desorption modes at high heat flux

Levitation of liquid microdroplets over a dry heated substrate near triple-phase contact line

Contact Info

Product

Resources

About