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A Comprehensive Study of Dynamic and Heat Transfer Characteristics of Droplet Impact on Micro-Scale Rectangular Grooved Surface

Author

Listed:
  • Zhe Yan

    (College of Engineering, Ocean University of China, Qingdao 266100, China)

  • Yan Li

    (College of Engineering, Ocean University of China, Qingdao 266100, China)

Abstract

Micro-scale structure of impact surface has a significant effect on the droplet impact. In this study, a three-dimensional numerical model of the droplet impact on micro-scale rectangular grooved surface was established based on coupled level set and volume of fluid (CLSVOF) method. Furthermore, the evolution of droplet morphology was experimentally studied and the validation of numerical model was carried out. The effects of groove width, contact angle, impact velocity and surface temperature on dynamic and heat transfer characteristics of droplet impact at low Weber numbers were numerically investigated. The anisotropy coefficient is defined to investigate the anisotropy of droplet morphology caused by the micro-scale grooved structure. The numerical results show that vertical spreading diameter is less than parallel spreading diameter, and the anisotropy of droplet morphology tends to reduce gradually with increasing contact angle. Both dynamic and heat transfer characteristics of droplet impact are the coupling effect of contact angle and groove width. The analysis of wettability state is utilized to illuminate the heat transfer characteristics of grooved surface. The maximum heat transfer rate of grooved surface increases with increasing impact velocity and surface temperature, and it decreases with increasing contact angle.

Suggested Citation

  • Zhe Yan & Yan Li, 2018. "A Comprehensive Study of Dynamic and Heat Transfer Characteristics of Droplet Impact on Micro-Scale Rectangular Grooved Surface," Energies, MDPI, vol. 11(6), pages 1-17, May.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:6:p:1390-:d:149676
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    References listed on IDEAS

    as
    1. Wu, Jie & Li, Ya-Dong, 2016. "Dynamic performance of a static or throwing droplet impact onto a solid substrate with different properties," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 446(C), pages 158-170.
    2. Emanuele Teodori & Pedro Pontes & Ana Moita & Anastasios Georgoulas & Marco Marengo & Antonio Moreira, 2017. "Sensible Heat Transfer during Droplet Cooling: Experimental and Numerical Analysis," Energies, MDPI, vol. 10(6), pages 1-27, June.
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    Cited by:

    1. Qiwei Cao & Yu Chen, 2022. "Leidenfrost Temperature on Trapezoidal Grooved Surface," Energies, MDPI, vol. 15(8), pages 1-15, April.
    2. Anastasia Islamova & Pavel Tkachenko & Kristina Pavlova & Pavel Strizhak, 2022. "Interaction between Droplets and Particles as Oil–Water Slurry Components," Energies, MDPI, vol. 15(21), pages 1-23, November.
    3. Hongyue Yang & Ji Qian & Ming Yang & Chunxi Li & Hengfan Li & Songling Wang, 2020. "Study on the Effects of Microstructural Surfaces on the Attachment of Moving Microbes," Energies, MDPI, vol. 13(17), pages 1-13, August.

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