Evaporation of Nanofluid Sessile Droplets Under Marangoni and Buoyancy Effects: Internal Convection and Instability
文献类型：期刊论文
| 作者 | Tao YQ(陶跃群)1 ; Zhu ZQ(朱志强)1,2
|
| 刊名 | NANOMATERIALS
 |
| 出版日期 | 2025-02-01 |
| 卷号 | 15期号:4 |
| 关键词 | droplet evaporation nanofluid thermal convection convection instability |
| ISSN号 | 2079-4991 |
| DOI | 10.3390/nano15040306 |
| 英文摘要 | Previous research has studied the evolution of patterns during the evaporation of sessile droplets of pure liquid, although there is a lack of reports focusing on the transition of flow regimes and flow stability of nanofluids. In this study, we investigate the evaporation of sessile droplets of Al2O3-ethanol nanofluid to elucidate the dynamic characteristics of the evaporation process from the perspective of internal convection. As the temperature increases, internal convection intensifies, significantly accelerating the evaporation rate. Three distinct convection flow patterns are observed under the combined influence of the Marangoni effect and buoyancy during evaporation: initially, two macroscopic convection cells form, followed by the periodic generation and propagation of hydrothermal waves (HTWs) near the contact line. Subsequently, B & eacute;nard-Marangoni (BM) convection cells gradually emerge and ultimately dominate the flow dynamics. The deposition patterns, which differ in part from the classic coffee-ring pattern, are closely related to the flow patterns of HTWs and BM convection cells during the pinning stage of droplet evaporation. Furthermore, the critical Marangoni (Ma) and Rayleigh (Ra) numbers for the onset of convection flow instability increase with rising substrate heating temperature. |
| 分类号 | 二类 |
| WOS研究方向 | Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001430014600001 |
| 资助机构 | This research was funded by China Manned Space Program (Grant number: TGMTYY1401X) and the Science and Technology Innovation 2025 Major Project of Ningbo City (Grant number: 2022Z213). |
| 其他责任者 | 朱志强 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/101466]  |
| 专题 | 力学研究所_国家微重力实验室 |
| 作者单位 | 1.Institute of Mechanics, CAS; 2.University of Chinese Academy of Sciences, CAS |
| 推荐引用方式 GB/T 7714 | Tao YQ,Zhu ZQ. Evaporation of Nanofluid Sessile Droplets Under Marangoni and Buoyancy Effects: Internal Convection and Instability[J]. NANOMATERIALS,2025,15(4). |
| APA | 陶跃群,&朱志强.(2025).Evaporation of Nanofluid Sessile Droplets Under Marangoni and Buoyancy Effects: Internal Convection and Instability.NANOMATERIALS,15(4). |
| MLA | 陶跃群,et al."Evaporation of Nanofluid Sessile Droplets Under Marangoni and Buoyancy Effects: Internal Convection and Instability".NANOMATERIALS 15.4(2025). |
入库方式： OAI收割
来源：力学研究所
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