多液滴热毛细迁移的研究 |
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引用本文: | 张朔婷,胡良,段俐,康琦. 多液滴热毛细迁移的研究[J]. 力学学报, 2014, 46(5): 802-806. DOI: 10.6052/0459-1879-13-244 |
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作者姓名: | 张朔婷 胡良 段俐 康琦 |
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作者单位: | 中国科学院力学研究所国家微重力实验室, 北京100190 |
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基金项目: | 国家自然科学基金(11372328,11032011);中国载人航天工程、中国科学院空间科学战略性先导科技专项(XDA04020405,XDA04020202-05)资助~~ |
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摘 要: | 通过密度匹配方法地面模拟微重力环境,以豆油和硅油作为实验系统母液和液滴,研究非均匀温度场中液滴热毛细迁移行为. 用马赫- 泽德干涉仪测量实验系统背景温度场. 用阴影法观测液滴热毛细迁移. 单液滴实验中,得到与YGB 理论预测趋势相一致的结果;双滴实验中,观察到小液滴超越大液滴现象;实验表明液滴迁移过程中液体的黏性系数起重要作用,小液滴超越大液滴过程中,两液滴水平位移都出现明显偏移,且大液滴横向位移更显著. 创新性的设计了三相多液滴热毛细迁移实验,为实际工业生产中多相分离问题提供科学研究基础.
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关 键 词: | 多液滴 微重力 温度梯度 热毛细迁移 双液滴相互作用 |
收稿时间: | 2014-04-22 |
DROPLET INTERACTIONS IN THERMOCAPILLARY MIGRATION |
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Affiliation: | National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China |
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Abstract: | Experiments were performed, with the method of density match in a terrestrial environment, to study the migration and interaction of drops with different diameters in matrix liquid under temperature gradient field. Thermocapillary migrations for both single and double droplets are observed via shadow method. For double droplets migration experiments, it can be observed that small droplet always moves faster than large droplet for different types of oils. The results indicate that there exist horizontal movements for both small and large droplets, and the large droplet has larger extent than small droplet. |
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