Evaporation of sessile ethanol-water droplets on a critically inclined heated surface

Katre, Pallavi; Gurrala, Pradeep; Balusamy, Saravanan; Banerjee, Sayak; Sahu, Kirti Chandra

doi:10.1016/j.ijmultiphaseflow.2020.103368

Cited by 36 publications

(30 citation statements)

References 52 publications

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“…At a constant pressure, the evaporation rate becomes higher at a lower degree of subcooling (i.e., a higher test temperature). Katre et al 49 pointed out that increasing the substrate temperature can increase the heat transfer rate to the sessile droplet, meaning a stronger driving force for evaporation.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Evaporation Kinetics of Sessile Water Droplets on a Smooth Stainless Steel Surface at Elevated Temperatures and Pressures

Song

Fan

2021

Langmuir

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The evaporation of water droplets on a solid surface at elevated temperatures under a pressurized condition has not yet been well understood, although this phenomenon is of both theoretical and practical significance. In this work, water droplet evaporation on smooth stainless steel surfaces in nitrogen gas atmosphere at elevated pressures and temperatures (up to 2 MPa and 202.4 °C, respectively) was investigated experimentally. It was observed that the increase in pressure diminishes the proportion of the constant contact radius stage over the entire evaporation time, whereas an opposite trend was found when raising the temperature, due to the change in the surface pinning ability with pressure (and temperature). The results also suggested that the evaporation mode transition is mainly affected by temperature rather than pressure. In addition, the evaporation rate was calculated under various degrees of subcooling, revealing that the evaporation rate increases almost linearly with pressure when keeping the degree of subcooling constant. However, when fixing the test temperature, a nonlinear decrease of the evaporation rate with pressure was observed. A power law growth of the evaporation rate with temperature was also found at a constant pressure. Last, it was uncovered by a theoretical analysis that the saturated vapor concentration is the dominant factor dictating the evaporation rate.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Evaporation Kinetics of Sessile Water Droplets on a Smooth Stainless Steel Surface at Elevated Temperatures and Pressures

Song

Fan

2021

Langmuir

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“…Katre et al [66] studied the contact line dynamics of ethanolwater BMD on the inclined heated surface. They placed a BMD having an initial ethanol concentration of 20 w.t.% and a volume of 3.5±0.3 μl on an inclined substrate.…”

Section: Contact Line Dynamics Of Single Component Dropletmentioning

confidence: 99%

Review of the binary mixture droplet evaporation studies

et al. 2021

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Understanding the evaporation characteristics of sessile binary mixture droplets (BMDs) is crucial in various industries, such as surface coating, ink-jet printing, evaporators, fuel combustion, and medical diagnosis. The underlying physics of BMDs has not yet been fully explored despite numerous prior studies. This paper reviews the recent studies on evaporating BMD and examines various studied and unaddressed issues. First, we introduce measurement techniques to estimate time-varying mixture concentrations of BMDs during evaporation. Next, the theoretical models that have been developed to predict selective evaporation dynamics of BMDs are reviewed and summarized. Finally, this paper reviews the recent studies that have examined the three distinct stages of the contact line motion and internal flows of BMDs.

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“…9 Several studies discussed the heat transfer behavior of droplets and bubbles on inclined surfaces. [10][11][12][13][14] Also, DWC has been the subject of many kinds of research regarding the better heat transfer rate in comparison to the FWC in recent years. [15][16][17][18][19] As an instance, Wu et al 20 investigated analysis of the DWC on diverse substrates to detect influences of surface conductivity, numerically.…”

Section: Introductionmentioning

confidence: 99%

“…Regarding the cyclic nature of the process as well as the instability of the drop, the formation of a liquid film would be prevented and hence DWC would be achieved 9 . Several studies discussed the heat transfer behavior of droplets and bubbles on inclined surfaces 10–14 . Also, DWC has been the subject of many kinds of research regarding the better heat transfer rate in comparison to the FWC in recent years 15–19 .…”

Section: Introductionmentioning

confidence: 99%

Numerical scrutinization of dropwise condensation heat transfer on an inclined surface

2022

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Recently, achieving an ameliorated heat transfer rate in dropwise condensation (DWC) has attracted the attention of many researchers. Several parameters, including chemical and physical properties of the substrate, inclination, and interfacial characteristics influence DWC heat transfer rate. The variation of inclination angle is followed by the change in droplet shape and consequently, the heat transfer rate are changed. In this study, the effect of droplet shape variation on diverse inclined substrates is simulated. Moreover, three‐dimensional mass, momentum, and energy equations considering the desired boundary conditions on the unstructured grid are utilized for the scrutinization of flow behavior and heat transfer for static and sliding droplets. For the sake of validation, the outcomes obtained from the simulation were compared with existent data in the literature and a proper agreement was attained. Regarding the outcomes, it was of concern that the influence of inclination angle on the droplet shape is more distinct at higher droplet volume; while no considerable change was seen on heat flux of small droplets by increasing the inclination angle. Furthermore, a higher heat transfer rate was noted by exceeding the inclination angle beyond a definite angle. Additionally, the increased heat transfer rate was affirmed by increasing the Marangoni number ( italicMa ) $({Ma})$.

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Evaporation of sessile ethanol-water droplets on a critically inclined heated surface

Cited by 36 publications

References 52 publications

Evaporation Kinetics of Sessile Water Droplets on a Smooth Stainless Steel Surface at Elevated Temperatures and Pressures

Evaporation Kinetics of Sessile Water Droplets on a Smooth Stainless Steel Surface at Elevated Temperatures and Pressures

Review of the binary mixture droplet evaporation studies

Numerical scrutinization of dropwise condensation heat transfer on an inclined surface

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