Analysis of fluid flow and particle transport in evaporating droplets exposed to infrared heating

Thokchom, Ashish Kumar; Gupta, Abhishek; Jaijus, Pallippadan Johny; Singh, Anugrah

doi:10.1016/j.ijheatmasstransfer.2013.09.012

Cited by 57 publications

(42 citation statements)

References 43 publications

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“…The results of theoretical and experimental investigations published by now allowed to develop a large group of practical applications based on fluxes of liquid droplets; see Refs. [22][23][24][25][26][27][28][29][30]. The most typical applications are e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Experimental [32][33][34] and theoretical [35][36][37] investigations showed that these processes may influence significantly the heat and mass transfer conditions in the droplet/gas stream system. The investigation of water (the most widely used liquid) droplet deformation when changing their velocities, sizes, initial temperature and temperature of surrounding gas in wide ranges are of interest in typical applications and are reported in [22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Water droplet deformation in gas stream: Impact of temperature difference between liquid and gas

Волков

Кузнецов

Стрижак

2015

International Journal of Heat and Mass Transfer

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Water droplet deformation in gas stream: Impact of temperature difference between liquid and gas

Волков

Кузнецов

Стрижак

2015

International Journal of Heat and Mass Transfer

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“…The systematic study of this phenomenon was started by Deegan et al The radial outward flow was thought to be the main driving force that transports the particles toward the pinned contact line producing a ring like pattern . Subsequent to these findings, several studies have reported application of the “Coffee ring effect” in evaporation induced self‐assembly of particles . Evaporation induced self‐assembly can also be used to develop inexpensive medical tests .…”

Section: Introductionmentioning

confidence: 99%

Internal fluid motion and particle transport in externally heated sessile droplets

2015

Self Cite

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Experiments and numerical simulations were carried out for an evaporating sessile droplet. The droplet was confined in the narrow gap between two glass plates, making it a "Hele-Shaw" droplet and particle image velocimetry technique was used. In case of the evaporating droplet with pinned contact line and exposed to ambient condition, two symmetric but counterrotating convection cells were observed. After complete evaporation, the particles deposited on the substrate near the contact line. The direction of the flow was reversed for a droplet placed on uniformly heated substrate, and the final deposition pattern was a large spot at the center with a thin line at the periphery. For asymmetrically heated substrate a single convection cell appeared, and the final deposition was also asymmetric. When the liquid was subjected to localized heating, the contact line no longer remains pinned and a relatively uniform deposition was obtained after complete drying.

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“…Thokchom et al [31] investigated the two-dimensional velocity field in a droplet resting on a substrate while it was drying. To avoid image distortion and lens effects due to the droplet curvature, they generated a confined 2D droplet between two non-wetting parallel plates instead of a 3D droplet and applied planar PIV to map the two components of the velocity.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Reconstruction of Evaporation-Induced Instabilities Using Volumetric Scanning Particle Image Velocimetry

Kazemi

Elliott

Nobes

2020

Optics

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The three-dimensional (3D) flow below the interface of an evaporating liquid at a low pressure is visualized and quantified using scanning particle image velocimetry. The technique presented highlights the use of a single camera and a relatively fast moving laser sheet to image the flow for an application where using more than one camera is difficult. The technique allows collection of the full three-dimensional velocity vector map over the whole liquid volume. The out-of-plane component of the velocity has been determined using two different processing approaches: (i) deriving the full vector from a 3D cross-correlation of the particle volumes and (ii) applying the continuity equation to determine out-of-plane velocities from the calculated in-plane velocity vector fields. The results obtained from both methods showed good agreement with each other. The 3D velocity field reveals the existence of a torus shaped vortex below the evaporating meniscus that was induced by the exposure of the cold liquid to the warmer solid walls. The velocity data also shows that the maximum velocity occurs below the interface, not at the interface which highlights that the observed vortex is not driven by thermocapillary forces that usually govern the flow during evaporation at smaller scales.

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Analysis of fluid flow and particle transport in evaporating droplets exposed to infrared heating

Cited by 57 publications

References 43 publications

Water droplet deformation in gas stream: Impact of temperature difference between liquid and gas

Water droplet deformation in gas stream: Impact of temperature difference between liquid and gas

Internal fluid motion and particle transport in externally heated sessile droplets

Three-Dimensional Reconstruction of Evaporation-Induced Instabilities Using Volumetric Scanning Particle Image Velocimetry

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