Deposition pattern and tracer particle motion of evaporating multi-component sessile droplets

Amjad, Muhammad; Yang, Yang; Raza, Ghulam; Gao, Hui; Zhang, Jun; Zhou, Leping; Du, Xiaoze; Wen, Dongsheng

doi:10.1016/j.jcis.2017.07.025

Cited by 24 publications

(12 citation statements)

References 53 publications

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“…In the mid-1970s, Picknett and Bexon 4 studied the droplet evaporation on the surface of poly-(tetrafluoroethylene) (PTFE) and deduced the evaporation rate equation on the basis of a diffusion-controlled evaporation model. In this study, three evaporation modes were distinguished: (1) the constant contact diameter (CCD) mode; (2) the constant contact angle (CCA) mode; (3) the mixed mode in which both contact angle and contact diameter change. Since then, much research has been conducted on sessile droplet evaporation on rigid surfaces.…”

Section: ■ Introductionmentioning

confidence: 99%

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A Study of the Evaporation of Hexane Lenses on an Ionic Liquid Surface: Effect of Wetting Mode

Liu

Zhu

et al. 2020

Langmuir

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The evaporation of hexane lenses on an ionic liquid (IL) (1-butyl-3-methylimidazolium hexafluorophosphate) surface is studied. The difference between the evaporation processes of the lens on the IL surface and on a distilled water (DW) surface with the same substrate liquid depth (2.6 mm) is primarily analyzed. The variation of the lens contact diameter D C and the deformation of the IL surface were experimentally observed. The results indicated that the spreading stage of a hexane lens was notably shorter in duration on the IL surface than on the DW surface. A hexane lens was pseudopartially wetted on the DW surface, and the plane position of the lens contact diameter remained level with the water surface throughout the evaporation process. In comparison, a hexane lens was partially wetted on the IL surface, and the plane position of the lens contact diameter was lower than the horizontal surface until the lens evaporated completely. The hexane lens evaporation on the IL surface was calculated by using the diffusion-controlled evaporation model under the constant contact angle mode. The calculated results agreed well with the experimental measurements. Finally, the evaporation of hexane lenses on the DW and the IL surfaces was compared through calculations. Although the maximum lens contact diameter on the DW surface was greater, it took a longer time for the lens to evaporate on the DW surface. This is because the more significant bending of the substrate liquid surface accelerated the lens evaporation. The results of this study offer a new approach for controlling droplet evaporation.

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Section: ■ Introductionmentioning

confidence: 99%

“…Droplet evaporation has received extensive attention for its wide range of applications, including spray cooling, particle deposition applications, DNA chip manufacturing, etc. It is therefore crucial to quantitatively investigate and control droplet evaporation.…”

Section: Introductionmentioning

confidence: 99%

A Study of the Evaporation of Hexane Lenses on an Ionic Liquid Surface: Effect of Wetting Mode

Liu

Zhu

et al. 2020

Langmuir

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“…The droplet evaporation process is a common physical phenomenon in nature. It has been widely used in many engineering applications, including DNA-chip manufacturing, inkjet printing, spray cooling, particle deposition applications, and so on. In 1977, Picknett and Bexon found three droplet evaporation modes on the polytetrafluoroethylene surface: droplet evaporation under the constant contact angle (CCA) evaporation mode, that under the constant contact diameter (CCD) evaporation mode, and that under the mixed evaporation mode.…”

Section: Introductionmentioning

confidence: 99%

Morphology Evolution of a Volatile Liquid Lens on Another Immiscible Liquid Surface Induced by Evaporation

et al. 2021

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A theoretical model was established to predict the morphology evolution of a volatile liquid lens evaporation on another immiscible liquid substrate surface. The theoretical model considered the dynamic process of contact line motion. On the basis of the boundary conditions established at the contact line, the morphology change of the liquid lens was calculated by numerically solving the Young–Laplace differential equations for the three interfaces. The mass evaporation rate was calculated by the diffusion-controlled evaporation model. Then, an experimental system was established to record the process of a hexane lens evaporation on the surface of an ionic liquid with a depth of 4 mm. The calculated hexane lens radius variation matches well with the experimental measurements, which shows the rationality of the present model. The calculated results show that the evaporation pattern of the liquid lens follows the constant contact-angle evaporation mode for ∼70% of the lifetime. During the later stage of evaporation, the contact angle decreases, accompanied by contraction of the contact line, which is similar to the mixed evaporation mode in the later stage of sessile droplet evaporation on a solid substrate surface. Furthermore, the influences of the initial hexane lens volume and the ionic liquid temperature on the dynamic contact angle were theoretically summarized. This study helps to provide in-depth insights into regulating the lens evaporation process on another immiscible liquid substrate surface to control the particle deposition mode.

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“…Nanoparticles disseminate in the base fluids and offer the potential to improve the optical characteristics of their nanofluids. Nanofluids consisting of nanoparticles are the best medium for transferring heat in solar collectors; composite nanofluids can be obtained by mixing these absorbing dark nanoparticles into the working fluids, a method which has been broadly studied previously (Chamsa-ard et al, 2017;Olia et al, 2019), (Amjad et al, 2017a;Amjad et al, 2017b). In addition to this, direct absorption solar collectors show greater efficiency as compared to the conventional absorption of Al/H 2 O nanofluids with that of pure water.…”

Section: Introductionmentioning

confidence: 99%

Performance Investigation of a Solar Thermal Collector Based on Nanostructured Energy Materials

et al. 2021

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The convective and conductive heat transfer between the solar collector and working fluids make photothermal performance limited, and result in a higher rate of heat loss from the surface of the conventional absorber to the surroundings. Direct absorption solar collectors (DASC) are a favorable alternative for their improved photothermal performance. In this study, a simulation based on the performance of a nanostructured solar collector has been carried out using TRNSYS. The connective and conductive heat transfer from direct solar collectors were improved by using nanofluids and three different nanostructured materials, CuO, GO, and ZnO, in this study. The analysis determines the outlet temperature of the working fluids that passed through the direct solar collector. The TRNSYS model consists of a direct solar collector and weather model for Lahore city, the simulations were performed for the whole year for 1,440 h. The stability of these nanostructured materials in the water was investigated by using a UV‐Vis spectrophotometer. Various performance parameters of direct solar collectors were determined, such as variation in outlet collector temperature and heat transfer rates. The numerical model is validated with experimental results. A maximum outlet temperature of 63°C was observed for GO-based nanofluids. The simulation results show that for the whole year, nanofluids improved the performance of direct solar collectors. Significant improvements in the heat transfer rate of 23.52, 21.11, and 15.09% were observed for the nanofluids based on nanostructures of CuO, ZnO, and GO respectively, as compared to water. These nanostructured energy materials are beneficial in solar-driven applications like solar desalination, solar water, and space heating.

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Deposition pattern and tracer particle motion of evaporating multi-component sessile droplets

Cited by 24 publications

References 53 publications

A Study of the Evaporation of Hexane Lenses on an Ionic Liquid Surface: Effect of Wetting Mode

A Study of the Evaporation of Hexane Lenses on an Ionic Liquid Surface: Effect of Wetting Mode

Morphology Evolution of a Volatile Liquid Lens on Another Immiscible Liquid Surface Induced by Evaporation

Performance Investigation of a Solar Thermal Collector Based on Nanostructured Energy Materials

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