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Atomization and Sprays

Published 12 issues per year

ISSN Print: 1044-5110

ISSN Online: 1936-2684

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 1.2 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.8 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.3 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00095 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.28 SJR: 0.341 SNIP: 0.536 CiteScore™:: 1.9 H-Index: 57

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EFFECTS OF LIQUID AND SURFACE CHARACTERISTICS ON OSCILLATION BEHAVIOR OF DROPLETS UPON IMPACT

Volume 24, Issue 10, 2014, pp. 895-913
DOI: 10.1615/AtomizSpr.2014007590
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ABSTRACT

The physical behavior of a single droplet impacting a surface is one of the most fascinating facets of spray research. Under some conditions, a droplet will strike and spread across a solid surface without splashing or rebounding. That droplet will spread and recoil for some time, oscillating between a disk and a hemisphere until these fluctuations diminish due to viscous damping. These oscillations affect the liquid coverage area and are essential in droplet solidification applications; yet little is known about them; Knowing more will, for example, enable higher-precision three-dimensional printing or enhanced droplet and spray cooling. Using mixtures of water and glycerol, oscillations of droplets with kinematic viscosities between 1.0 × 10−6 and 1.1 × 10−4 m2 /s are explored, focusing on the damping behavior. Several impact substrates were used. Droplets freefall onto the target with velocities of 0.5−1.5 m/s. The Weber number of the droplets ranged from 10 to 100 and the Reynolds number from 15 to 4000. The impact velocity, spreading lamella diameter, and thickness at the center of each droplet were measured. Droplet kinematic viscosity, impact velocity, and surface tension effects are found to play a role in oscillations, which occur at approximately 75−90 Hz. For the liquids tested, a hydrophilic surface thins the droplet, arresting oscillations quickly, whereas a hydrophobic surface sustains oscillations. Correspondingly, a highly viscous droplet tends to stop oscillations sooner than a less viscous droplet. Increasing the velocity of impact restricts oscillations by spreading liquid across a larger area. For the range of conditions studied, viscosity dominates droplet oscillations when compared to the surface effects. We explore the interplay between viscous and surface tension effects in the oscillations. The spring constant and damping coefficient of an analogous harmonic system are calculated for the observed droplet oscillations. The tested liquid droplets generally exhibit underdamped behavior; higher damping coefficients are associated with more wetting and more viscous droplet liquids−a 103 increase in viscosity corresponds with an approximately 101 increase in damping. The spring constant appears to be influenced by the droplet composition and the surface wettability in a less trivial manner, with similar magnitudes and no discernable pattern in the spring constant (1.5−3.0 N/m) for all droplets and surface conditions examined.

CITED BY
  1. Lin Shiji, Zhao Binyu, Zou Song, Guo Jianwei, Wei Zheng, Chen Longquan, Impact of viscous droplets on different wettable surfaces: Impact phenomena, the maximum spreading factor, spreading time and post-impact oscillation, Journal of Colloid and Interface Science, 516, 2018. Crossref

  2. Zhang Bin, Li Jingyin, Guo Penghua, Lv Qian, Experimental studies on the effect of Reynolds and Weber numbers on the impact forces of low-speed droplets colliding with a solid surface, Experiments in Fluids, 58, 9, 2017. Crossref

  3. Chen Longquan, Bonaccurso Elmar, Deng Peigang, Zhang Haibo, Droplet impact on soft viscoelastic surfaces, Physical Review E, 94, 6, 2016. Crossref

  4. Wang Fujun, Fang Tiegang, Post-impact drop vibration on a hydrophilic surface, Experimental Thermal and Fluid Science, 98, 2018. Crossref

  5. Ahmed Abrar, Qureshi Ahmed Jawad, Fleck Brian A., Waghmare Prashant R., Effects of magnetic field on the spreading dynamics of an impinging ferrofluid droplet, Journal of Colloid and Interface Science, 532, 2018. Crossref

  6. Qin Mengxiao, Tang Chenglong, Tong Shangqing, Zhang Peng, Huang Zuohua, On the role of liquid viscosity in affecting droplet spreading on a smooth solid surface, International Journal of Multiphase Flow, 117, 2019. Crossref

  7. Chen Longquan, Lin Shiji, Deng Peigang, Wang Xiang, Microdrop impact on soft substrates at low Weber numbers, Journal of Adhesion Science and Technology, 33, 19, 2019. Crossref

  8. Zhong Yuan, Du Haicun, Zhang Ying, Chen Yue, Liu Qiang, Huang Jie, Experimental research on dynamic characteristics of viscous droplets impacting rough solid surfaces at different temperatures, Canadian Journal of Physics, 97, 12, 2019. Crossref

  9. Qi Wenliang, Weisensee Patricia B., Dynamic wetting and heat transfer during droplet impact on bi-phobic wettability-patterned surfaces, Physics of Fluids, 32, 6, 2020. Crossref

  10. Zheng Jiangen, Cheng Yang, Huang Yingzhou, Wang Shuxia, Liu Liyu, Chen Guo, Drop impacting on a surface with adjustable wettability based on the dielectrowetting effect, Physics of Fluids, 32, 9, 2020. Crossref

  11. Liu Hong, Si Chao, Cai Chang, Zhao Chuanqi, Yin Hongchao, Experimental investigation on impact and spreading dynamics of a single ethanol–water droplet on a heated surface, Chemical Engineering Science, 229, 2021. Crossref

  12. Marin Quintero Juan S., Waghmare Prashant R., Sessile drop response to a single wave electrokinetic excitation, Physics of Fluids, 32, 12, 2020. Crossref

  13. Cai Chang, Si Chao, Liu Hong, Yin Hongchao, Influence of alcohol additive and surface temperature on impact and spreading characteristics of a single water droplet, International Journal of Heat and Mass Transfer, 180, 2021. Crossref

  14. Chen Longquan, Wang Yonggui, Peng Xiaoyan, Zhu Qing, Zhang Kai, Impact Dynamics of Aqueous Polymer Droplets on Superhydrophobic Surfaces, Macromolecules, 51, 19, 2018. Crossref

  15. Giorgi M.-L., Duval H., Balabane M., The proper orthogonal decomposition: A powerful tool for studying drop oscillations, Review of Scientific Instruments, 92, 11, 2021. Crossref

  16. Esmaeili Amir R., Mir Noshin, Mohammadi Reza, Further Step toward a Comprehensive Understanding of the Effect of Surfactant Additions on Altering the Impact Dynamics of Water Droplets, Langmuir, 37, 2, 2021. Crossref

  17. Bansal Shubhi, Tokuda Yutaka, Peasley Jonathon, Subramanian Sriram, Electrically Induced Liquid Metal Droplet Bouncing, Langmuir, 38, 22, 2022. Crossref

  18. Li Bin, Mehrizi Abbasali Abouei, Lin Shiji, Joo Sangwoo, Chen Longquan, Dynamic behaviors of impinging viscoelastic droplets on superhydrophobic surfaces heated above the boiling temperature, International Journal of Heat and Mass Transfer, 183, 2022. Crossref

  19. Dwivedi Raghvendra Kumar, Jain Vandana, Muralidhar K., Dynamic contact angle model for resolving low-viscosity droplet oscillations during spreading over a surface with varying wettability, Physical Review Fluids, 7, 3, 2022. Crossref

  20. Chaffart Donovan, Shi Songlin, Ma Chen, Lv Cunjing, Ricardez-Sandoval Luis A., A Moving Front Kinetic Monte Carlo Algorithm for Moving Interface Systems, The Journal of Physical Chemistry B, 126, 9, 2022. Crossref

  21. Bennacer Rachid, Ma Xiaoyan, Sefiane Khellil, On the effect of concentration and wettability on polymer drops impact, dynamics and energy dissipation, The European Physical Journal Applied Physics, 97, 2022. Crossref

  22. Kang Dong Kwan, Lee Sangmin, Periodicity of Droplet Impact Behavior by Liquid Viscosity on PDMS Surface, Journal of the Korean Society for Precision Engineering, 39, 11, 2022. Crossref

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