The Experts below are selected from a list of 344793 Experts worldwide ranked by ideXlab platform
Jie Chen - One of the best experts on this subject based on the ideXlab platform.
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Preparation and droplet Impact Dynamics of superhydrophobic nano-aluminum films on metal substrates
Journal of Materials Science, 2018Co-Authors: Zhe Xu, Zhibo Wei, Xiaogang Guo, Deyi Jiang, Fei Wu, Jie ChenAbstract:A simple electrophoretic deposition method followed by stearic acid modification was developed to prepare superhydrophobic multiscale nano-aluminum films on a series of metal substrates such as nickel, copper, titanium and stainless steel. The surface morphology and chemical compositions were characterized by a field emission scanning electron microscopy, X-ray diffraction, energy-dispersive X-ray spectroscope, Fourier-transform infrared spectrophotometer and white light interferometer. The resultant nano-aluminum films exhibited excellent superhydrophobicity with a water contact angle of 168.5° and a water sliding angle of 2°. Furthermore, the obtained nano-Al films showed the desirable stability and durability after the related testing. In addition, the Impact dynamic behaviors of water droplet on the superhydrophobic nano-Al films were described via the corresponding parameters, such as Weber number (We), spreading factor (β), contact time (tc), etc. Based on these characteristics, the superhydrophobic nano-Al films presented excellent water-repellent property. The EPD process is an efficient method to prepare superhydrophobic nano-Al films on common engineering metal materials, which can be applied to various industrial or manufacturing fields, including oil–water separation, anti-icing, self-cleaning, anti-corrosion, microelectronic fabrication and so forth.
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Preparation and droplet Impact Dynamics of superhydrophobic nano-aluminum films on metal substrates
Journal of Materials Science, 2018Co-Authors: Zhe Xu, Zhibo Wei, Xiaogang Guo, Deyi Jiang, Fei Wu, Jie ChenAbstract:A simple electrophoretic deposition method followed by stearic acid modification was developed to prepare superhydrophobic multiscale nano-aluminum films on a series of metal substrates such as nickel, copper, titanium and stainless steel. The surface morphology and chemical compositions were characterized by a field emission scanning electron microscopy, X-ray diffraction, energy-dispersive X-ray spectroscope, Fourier-transform infrared spectrophotometer and white light interferometer. The resultant nano-aluminum films exhibited excellent superhydrophobicity with a water contact angle of 168.5° and a water sliding angle of 2°. Furthermore, the obtained nano-Al films showed the desirable stability and durability after the related testing. In addition, the Impact dynamic behaviors of water droplet on the superhydrophobic nano-Al films were described via the corresponding parameters, such as Weber number (We), spreading factor (β), contact time (tc), etc. Based on these characteristics, the superhydrophobic nano-Al films presented excellent water-repellent property. The EPD process is an efficient method to prepare superhydrophobic nano-Al films on common engineering metal materials, which can be applied to various industrial or manufacturing fields, including oil–water separation, anti-icing, self-cleaning, anti-corrosion, microelectronic fabrication and so forth.
Zhe Xu - One of the best experts on this subject based on the ideXlab platform.
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Preparation and droplet Impact Dynamics of superhydrophobic nano-aluminum films on metal substrates
Journal of Materials Science, 2018Co-Authors: Zhe Xu, Zhibo Wei, Xiaogang Guo, Deyi Jiang, Fei Wu, Jie ChenAbstract:A simple electrophoretic deposition method followed by stearic acid modification was developed to prepare superhydrophobic multiscale nano-aluminum films on a series of metal substrates such as nickel, copper, titanium and stainless steel. The surface morphology and chemical compositions were characterized by a field emission scanning electron microscopy, X-ray diffraction, energy-dispersive X-ray spectroscope, Fourier-transform infrared spectrophotometer and white light interferometer. The resultant nano-aluminum films exhibited excellent superhydrophobicity with a water contact angle of 168.5° and a water sliding angle of 2°. Furthermore, the obtained nano-Al films showed the desirable stability and durability after the related testing. In addition, the Impact dynamic behaviors of water droplet on the superhydrophobic nano-Al films were described via the corresponding parameters, such as Weber number (We), spreading factor (β), contact time (tc), etc. Based on these characteristics, the superhydrophobic nano-Al films presented excellent water-repellent property. The EPD process is an efficient method to prepare superhydrophobic nano-Al films on common engineering metal materials, which can be applied to various industrial or manufacturing fields, including oil–water separation, anti-icing, self-cleaning, anti-corrosion, microelectronic fabrication and so forth.
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Preparation and droplet Impact Dynamics of superhydrophobic nano-aluminum films on metal substrates
Journal of Materials Science, 2018Co-Authors: Zhe Xu, Zhibo Wei, Xiaogang Guo, Deyi Jiang, Fei Wu, Jie ChenAbstract:A simple electrophoretic deposition method followed by stearic acid modification was developed to prepare superhydrophobic multiscale nano-aluminum films on a series of metal substrates such as nickel, copper, titanium and stainless steel. The surface morphology and chemical compositions were characterized by a field emission scanning electron microscopy, X-ray diffraction, energy-dispersive X-ray spectroscope, Fourier-transform infrared spectrophotometer and white light interferometer. The resultant nano-aluminum films exhibited excellent superhydrophobicity with a water contact angle of 168.5° and a water sliding angle of 2°. Furthermore, the obtained nano-Al films showed the desirable stability and durability after the related testing. In addition, the Impact dynamic behaviors of water droplet on the superhydrophobic nano-Al films were described via the corresponding parameters, such as Weber number (We), spreading factor (β), contact time (tc), etc. Based on these characteristics, the superhydrophobic nano-Al films presented excellent water-repellent property. The EPD process is an efficient method to prepare superhydrophobic nano-Al films on common engineering metal materials, which can be applied to various industrial or manufacturing fields, including oil–water separation, anti-icing, self-cleaning, anti-corrosion, microelectronic fabrication and so forth.
Chun Yang - One of the best experts on this subject based on the ideXlab platform.
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Triple condensate halo from a single water droplet Impacting upon a cold surface
Applied Physics Letters, 2019Co-Authors: Yugang Zhao, Hui Zhang, Chun YangAbstract:Understanding the Dynamics of water droplets Impacting upon a solid surface is of importance from both fundamental and practical standpoints. While the Impact Dynamics of a water droplet upon a heated surface has been extensively studied, the Impact characteristics of droplets upon a cold surface remain elusive. Here, we report the formation of a triple condensate halo observed during a water droplet Impacting at low velocity upon a cold surface. Due to the interplay of droplet Impact and vapor mass diffusion during the droplet spreading and cooling processes, two condensation stages occur, engendering this unique condensate halo with three distinctive bands. We further examine experimentally the effects of droplet Impact velocity (in terms of Weber number) and substrate temperature on the three bands of condensate halo. We also provide scaling analyses to explain the experimental results. Our experimental investigation and theoretical analysis reported in this study reveal insights into the droplet Impact Dynamics and the associated condensation heat transfer.Understanding the Dynamics of water droplets Impacting upon a solid surface is of importance from both fundamental and practical standpoints. While the Impact Dynamics of a water droplet upon a heated surface has been extensively studied, the Impact characteristics of droplets upon a cold surface remain elusive. Here, we report the formation of a triple condensate halo observed during a water droplet Impacting at low velocity upon a cold surface. Due to the interplay of droplet Impact and vapor mass diffusion during the droplet spreading and cooling processes, two condensation stages occur, engendering this unique condensate halo with three distinctive bands. We further examine experimentally the effects of droplet Impact velocity (in terms of Weber number) and substrate temperature on the three bands of condensate halo. We also provide scaling analyses to explain the experimental results. Our experimental investigation and theoretical analysis reported in this study reveal insights into the droplet impac...
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Triple condensate halo from water droplets Impacting on cold surfaces
arXiv: Fluid Dynamics, 2018Co-Authors: Yugang Zhao, Hui Zhang, Chun YangAbstract:Understanding the Dynamics in the deposition of water droplets onto solid surfaces is of importance from both fundamental and practical viewpoints. While the deposition of a water droplet onto a heated surface is extensively studied, the characteristics of depositing a droplet onto a cold surface and the phenomena leading to such behavior remain elusive. Here we report the formation of a triple condensate halo observed during the deposition of a water droplet onto a cold surface, due to the interplay between droplet Impact Dynamics and vapor diffusion. Two subsequent condensation stages occur during the droplet spreading and cooling processes, engendering this unique condensate halo with three distinctive bands. We further proposed a scaling model to interpret the size of each band, and the model is validated by the experiments of droplets with different Impact velocity and varying substrate temperature. Our experimental and theoretical investigation of the droplet Impact Dynamics and the associated condensation unravels the mass and heat transfer among droplet, vapor and substrate, offer a new sight for designing of heat exchange devices.
Hui Zhang - One of the best experts on this subject based on the ideXlab platform.
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Triple condensate halo from a single water droplet Impacting upon a cold surface
Applied Physics Letters, 2019Co-Authors: Yugang Zhao, Hui Zhang, Chun YangAbstract:Understanding the Dynamics of water droplets Impacting upon a solid surface is of importance from both fundamental and practical standpoints. While the Impact Dynamics of a water droplet upon a heated surface has been extensively studied, the Impact characteristics of droplets upon a cold surface remain elusive. Here, we report the formation of a triple condensate halo observed during a water droplet Impacting at low velocity upon a cold surface. Due to the interplay of droplet Impact and vapor mass diffusion during the droplet spreading and cooling processes, two condensation stages occur, engendering this unique condensate halo with three distinctive bands. We further examine experimentally the effects of droplet Impact velocity (in terms of Weber number) and substrate temperature on the three bands of condensate halo. We also provide scaling analyses to explain the experimental results. Our experimental investigation and theoretical analysis reported in this study reveal insights into the droplet Impact Dynamics and the associated condensation heat transfer.Understanding the Dynamics of water droplets Impacting upon a solid surface is of importance from both fundamental and practical standpoints. While the Impact Dynamics of a water droplet upon a heated surface has been extensively studied, the Impact characteristics of droplets upon a cold surface remain elusive. Here, we report the formation of a triple condensate halo observed during a water droplet Impacting at low velocity upon a cold surface. Due to the interplay of droplet Impact and vapor mass diffusion during the droplet spreading and cooling processes, two condensation stages occur, engendering this unique condensate halo with three distinctive bands. We further examine experimentally the effects of droplet Impact velocity (in terms of Weber number) and substrate temperature on the three bands of condensate halo. We also provide scaling analyses to explain the experimental results. Our experimental investigation and theoretical analysis reported in this study reveal insights into the droplet impac...
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Triple condensate halo from water droplets Impacting on cold surfaces
arXiv: Fluid Dynamics, 2018Co-Authors: Yugang Zhao, Hui Zhang, Chun YangAbstract:Understanding the Dynamics in the deposition of water droplets onto solid surfaces is of importance from both fundamental and practical viewpoints. While the deposition of a water droplet onto a heated surface is extensively studied, the characteristics of depositing a droplet onto a cold surface and the phenomena leading to such behavior remain elusive. Here we report the formation of a triple condensate halo observed during the deposition of a water droplet onto a cold surface, due to the interplay between droplet Impact Dynamics and vapor diffusion. Two subsequent condensation stages occur during the droplet spreading and cooling processes, engendering this unique condensate halo with three distinctive bands. We further proposed a scaling model to interpret the size of each band, and the model is validated by the experiments of droplets with different Impact velocity and varying substrate temperature. Our experimental and theoretical investigation of the droplet Impact Dynamics and the associated condensation unravels the mass and heat transfer among droplet, vapor and substrate, offer a new sight for designing of heat exchange devices.
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Computational Study of Single Droplet Deposition on Randomly Rough Surfaces: Surface Morphological Effect on Droplet Impact Dynamics
Industrial & Engineering Chemistry Research, 2018Co-Authors: Jie Xiao, Hui Zhang, Oluwafemi Ayodele George, Fei Zhou, Yinlun HuangAbstract:Tremendous efforts have been devoted to the modeling of droplet deposition on smooth and patterned surfaces with ordered structures. However, systematic work focusing on randomly rough surfaces, which are the most common bare substrate surfaces, can be hardly identified. A phase field modeling method together with a unique analysis approach has been developed in this work to characterize single droplet deposition on randomly rough surfaces. It is interesting to observe that the droplet shape evolves quite differently on a randomly rough surface, as compared to a patterned surface, even if two surfaces have the same roughness. Parametric studies have been carried out to explore how the morphological metrics of randomly rough surfaces, which include the Wenzel roughness parameter (Wr) and the root-mean-square roughness (Rr), can affect droplet Impact Dynamics. The quantitative relationships derived from this study can eventually shed light on droplet shape on-aim control during the deposition process, which...
Deyi Jiang - One of the best experts on this subject based on the ideXlab platform.
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Preparation and droplet Impact Dynamics of superhydrophobic nano-aluminum films on metal substrates
Journal of Materials Science, 2018Co-Authors: Zhe Xu, Zhibo Wei, Xiaogang Guo, Deyi Jiang, Fei Wu, Jie ChenAbstract:A simple electrophoretic deposition method followed by stearic acid modification was developed to prepare superhydrophobic multiscale nano-aluminum films on a series of metal substrates such as nickel, copper, titanium and stainless steel. The surface morphology and chemical compositions were characterized by a field emission scanning electron microscopy, X-ray diffraction, energy-dispersive X-ray spectroscope, Fourier-transform infrared spectrophotometer and white light interferometer. The resultant nano-aluminum films exhibited excellent superhydrophobicity with a water contact angle of 168.5° and a water sliding angle of 2°. Furthermore, the obtained nano-Al films showed the desirable stability and durability after the related testing. In addition, the Impact dynamic behaviors of water droplet on the superhydrophobic nano-Al films were described via the corresponding parameters, such as Weber number (We), spreading factor (β), contact time (tc), etc. Based on these characteristics, the superhydrophobic nano-Al films presented excellent water-repellent property. The EPD process is an efficient method to prepare superhydrophobic nano-Al films on common engineering metal materials, which can be applied to various industrial or manufacturing fields, including oil–water separation, anti-icing, self-cleaning, anti-corrosion, microelectronic fabrication and so forth.
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Preparation and droplet Impact Dynamics of superhydrophobic nano-aluminum films on metal substrates
Journal of Materials Science, 2018Co-Authors: Zhe Xu, Zhibo Wei, Xiaogang Guo, Deyi Jiang, Fei Wu, Jie ChenAbstract:A simple electrophoretic deposition method followed by stearic acid modification was developed to prepare superhydrophobic multiscale nano-aluminum films on a series of metal substrates such as nickel, copper, titanium and stainless steel. The surface morphology and chemical compositions were characterized by a field emission scanning electron microscopy, X-ray diffraction, energy-dispersive X-ray spectroscope, Fourier-transform infrared spectrophotometer and white light interferometer. The resultant nano-aluminum films exhibited excellent superhydrophobicity with a water contact angle of 168.5° and a water sliding angle of 2°. Furthermore, the obtained nano-Al films showed the desirable stability and durability after the related testing. In addition, the Impact dynamic behaviors of water droplet on the superhydrophobic nano-Al films were described via the corresponding parameters, such as Weber number (We), spreading factor (β), contact time (tc), etc. Based on these characteristics, the superhydrophobic nano-Al films presented excellent water-repellent property. The EPD process is an efficient method to prepare superhydrophobic nano-Al films on common engineering metal materials, which can be applied to various industrial or manufacturing fields, including oil–water separation, anti-icing, self-cleaning, anti-corrosion, microelectronic fabrication and so forth.
