Numerical contact line behavior prediction for droplet-wall impact by the modified Hoffman-function-based dynamic contact angle model
| Parent link: | International Communications in Heat and Mass Transfer.— .— Amsterdam: Elsevier Science Publishing Company Inc. Vol. 160.— 2025.— Article number 108372, 12 p. |
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| Other Authors: | , , , , , |
| Summary: | Title screen The droplet-wall impact phenomenon is observed in numerous applications such as spray cooling, coatings, wetting, and inkjet printing. To date, there are still unresolved issues related to the effect of wettability and hysteresis on droplet spreading along a wall and rim fingering. This research deals with the effects of dynamic and static contact angles on droplet spreading evolution, as well as with droplet rim fingering characterization. Experiments and direct numerical simulations are performed in a wide range of Weber numbers (We = 1–375). At high We numbers, the droplet rim loses stability and begins to deform, forming fingers. The critical disturbances resulting in the formation of fingers occur in times of around 1 ms, which are significantly smaller than those typical of maximum droplet spreading. Moreover, a certain shape of the droplet meniscus is shown to be necessary for the growth of fingers. When the contact line receding takes place, the contact angle depends only on the initial contact line acceleration. Considering the contact angle hysteresis and its dependence on We ensures a better agreement with experimental data during the droplet advancing-to-receding transition and the receding phase Текстовый файл AM_Agreement |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://doi.org/10.1016/j.icheatmasstransfer.2024.108372 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=679677 |
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| 200 | 1 | |a Numerical contact line behavior prediction for droplet-wall impact by the modified Hoffman-function-based dynamic contact angle model |f I. S. Vozhakov, S. Y. Misyura, A. M. Shain [et al.] | |
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| 300 | |a Title screen | ||
| 320 | |a References: 53 tit | ||
| 330 | |a The droplet-wall impact phenomenon is observed in numerous applications such as spray cooling, coatings, wetting, and inkjet printing. To date, there are still unresolved issues related to the effect of wettability and hysteresis on droplet spreading along a wall and rim fingering. This research deals with the effects of dynamic and static contact angles on droplet spreading evolution, as well as with droplet rim fingering characterization. Experiments and direct numerical simulations are performed in a wide range of Weber numbers (We = 1–375). At high We numbers, the droplet rim loses stability and begins to deform, forming fingers. The critical disturbances resulting in the formation of fingers occur in times of around 1 ms, which are significantly smaller than those typical of maximum droplet spreading. Moreover, a certain shape of the droplet meniscus is shown to be necessary for the growth of fingers. When the contact line receding takes place, the contact angle depends only on the initial contact line acceleration. Considering the contact angle hysteresis and its dependence on We ensures a better agreement with experimental data during the droplet advancing-to-receding transition and the receding phase | ||
| 336 | |a Текстовый файл | ||
| 371 | 0 | |a AM_Agreement | |
| 461 | 1 | |t International Communications in Heat and Mass Transfer |c Amsterdam |n Elsevier Science Publishing Company Inc. | |
| 463 | 1 | |t Vol. 160 |v Article number 108372, 12 p. |d 2025 | |
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a Droplet-wall impact | |
| 610 | 1 | |a Droplet contact line | |
| 610 | 1 | |a Droplet contact angle | |
| 610 | 1 | |a Fingering | |
| 610 | 1 | |a Contact angle hysteresis | |
| 701 | 1 | |a Vozhakov |b I. S. |g Ivan Sergeevich | |
| 701 | 1 | |a Misyura |b S. Ya. |c specialist in the field of power engineering |c leading researcher of Tomsk Polytechnic University, candidate of technical sciences |f 1964- |g Sergey Yakovlevich |9 21039 | |
| 701 | 1 | |a Shain |b A. M. |g Aleksandr Mikhaylovich | |
| 701 | 1 | |a Mullyadzhanov |b R. I. |g Rustam Ilkhamovich | |
| 701 | 1 | |a Piskunov |b M. V. |c specialist in the field of thermal engineering |c engineer of Tomsk Polytechnic University |f 1991- |g Maksim Vladimirovich |9 17691 | |
| 701 | 1 | |a Strizhak |b P. A. |c Specialist in the field of heat power energy |c Doctor of Physical and Mathematical Sciences (DSc), Professor of Tomsk Polytechnic University (TPU) |f 1985- |g Pavel Alexandrovich |9 15117 | |
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