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Advances in Thermocapillary Droplet Migration
Wu ZB(武作兵)
Source Publication24th IUPAP Conference on Computational Physics (2012): Introduction, acknowledgements, program Luca Baiotti and Hideaki Takabe 2013 J. Phys.: Conf. Ser. 454 011001
2012
Conference NameConference on Computational Physics 2012
Conference Date2012/10/14-18
Conference PlaceKobe, Japan
AbstractIn microgravity environment, a droplet/bubble placed in an ambient fluid will move in the direction of temperature gradient due to interface tension. This phenomenon called as thermocapillary migration is an important topic in both fundamental hydrodynamics and practical applications. In this paper, advances in theoretical analysis and numerical simulation of thermocapillary droplet migration in microgravity are reported[1,2]. By using the frant tracking method, it is observed that the thermocapillary migration of a planar non-deformed droplet with an uniform temperature gradients is steady at moderate Marangoni numbers, but unsteady at large Marangoni numbers. The numerical results at large Marangoni numbers qualitatively agree with of those of experimental investigations. From the overal steady-state energy balance in the flow domain, a non-conservative integral thermal flux across the surface for a steady thermocapillary droplet migration at large Marangoni numbers is found by using the asymptotic analysis. It presents that the thermocapillary droplet migration at large Marangoni numbers cannot reach any steady states and is thus a unsteady process. We thank the IMECH/SCCAS SHENTENG 1800/7000 research computing facilities for assisting in the computation. This work was partially supported by the National Science Foundation through the Grant No. 1172310.
KeywordDroplet Surface Tension Thermocapillary Migration Marangoni Numbers Microgravity
DepartmentLNM微纳米流体力学
Language英语
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/46939
Collection非线性力学国家重点实验室
Recommended Citation
GB/T 7714
Wu ZB. Advances in Thermocapillary Droplet Migration[C]24th IUPAP Conference on Computational Physics (2012): Introduction, acknowledgements, program Luca Baiotti and Hideaki Takabe 2013 J. Phys.: Conf. Ser. 454 011001,2012.
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