Displacement of liquid droplets on a surface by a shearing air flow

Fan, Jiangkun; Wilson, Mark C. T.; Kapur, Nikil

doi:10.1016/j.jcis.2010.12.087

Cited by 93 publications

(78 citation statements)

References 35 publications

(55 reference statements)

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“…In the work [8] the dynamics is studied for different droplets on the silane substrates. The values of velocity required to move droplet and correspondent friction forces in [8] were very similar to those obtained in our work. In our work it was found that with increasing temperature the droplet motion starts at somewhat larger gas flows, and the friction force affecting the droplet on the heated surface, calculated by the above formula, is a few times larger than in the case without heating.…”

Section: Resultssupporting

confidence: 87%

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The effect of surface temperature on dynamics of water droplet in minichannel with gas flow

Isachenko

Orlik

2017

EPJ Web Conf.

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Abstract.The experiments have been carried out to study dynamics of liquid droplets, blown by the gas flow in a mini-channel. The mean velocity at which the droplet motion over the substrate starts was determined depending on the surface temperature at different droplet volumes. The shadow method was the main method of measurement. The advancing and receding contact angles were measured depending on the gas flow rate. The friction force was determined using the advancing and receding contact angles and droplet size. A motion of a droplet was also observed from the top. The local velocity and acceleration of droplet were calculated.

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Section: Resultssupporting

confidence: 87%

“…There are studies about dynamics of liquid droplet in turbulent flow in a sufficiently high channel comparing with height of droplet [8] and including vibration effect [9]. Numerical work [10] reports the dynamic and interaction of two droplets in a channel with gas flow, where the key parameter is the distance between the droplets.…”

Section: Introductionmentioning

confidence: 99%

The effect of surface temperature on dynamics of water droplet in minichannel with gas flow

Isachenko

Orlik

2017

EPJ Web Conf.

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“…Gas action on evaporation of drop is also known and studied [7], but mostly all investigations have been carried out in open ambient air, where conditions are not very controlled. Dynamics of drop on surface by a shearing air in channel have been studied in [8], it is shown strong influence of contact angle hysteresis and drop sizes on the dynamics. This experimental work presents results of evaporation of sessile drop on a heated substrate in mini channel under blowing air laminar flow.…”

Section: Introductionmentioning

confidence: 99%

The effect of temperature and gas Reynolds number on evaporation of a sessile liquid drop in mini-channel

2016

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Abstract. Experimental setup has been designed and manufactured to study the evaporation processes of liquid drop under blowing gas in mini-channel. The height of channel can be varied from 3 to 20 mm. Substrates are removable and its surface temperature is kept to constant value. The shadow method is main measurement technique. Series of experiments with 100 μl water drop on polished stainless still substrate are carried out in channel with 9 mm height. Dependences of evaporating rate for different range of temperatures and gas Reynolds numbers are obtained.

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“…The model demonstrated that the air velocity required to initiate droplet motion depends strongly on contact angle hysteresis. Recently Fan et al [17] postulated a model that balances surface tension forces at the contact line and the drag force due to air motion. The results show, that the initiation of droplet motion depends on the contact angle and the droplet size.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of water drop motions induced by superposition of vibrations and shear flows

Maurer

Janoske

2015

Computational Methods in Multiphase Flow VIII

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Droplet motion induced by mechanical vibrations and superposed shear flowshas not yet been investigated in detail, despite its major importance in many applications. The current study introduces a novel experimental setup for this purpose. Furthermore, droplet motion measurements on acrylic glass surfaces are presented. This study observes mechanical vibrations and shear flows separately as well as in combination. Measurements with sinusoidal vibrations show that the droplets overcome the force due to contact angle hysteresis, when vibrational acceleration is increased above a certain threshold. Consequently, droplets experience a lateral motion, particularly if the vibrational frequency matches their natural frequency. Separate experiments with shear flows indicate that droplet motions are initiated when a critical flow velocity is reached. The flow velocity required to initiate drop motions decreases when increasing droplet volume. Superposing vibration with the shear flow results in an inconvenient droplet contour and motion, the shaking slip motion. Additionally, the required flow velocity for droplet motion reduces noticeably. Furthermore, the influence of vibrations on the initial droplet motion increases with higher droplet volume. The study concludes that the mobility of water droplets on acrylic glass surfaces increases significantly when a superposition between vibrational forces and shear flows exists.

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Displacement of liquid droplets on a surface by a shearing air flow

Cited by 93 publications

References 35 publications

The effect of surface temperature on dynamics of water droplet in minichannel with gas flow

The effect of surface temperature on dynamics of water droplet in minichannel with gas flow

The effect of temperature and gas Reynolds number on evaporation of a sessile liquid drop in mini-channel

Experimental study of water drop motions induced by superposition of vibrations and shear flows

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