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Microgravity Science and Technology

, Volume 22, Issue 3, pp 295–303 | Cite as

Thermocapillary Migration of Deformable Bubbles at Moderate to Large Marangoni Number in Microgravity

  • Jian-Fu ZhaoEmail author
  • Zhen-Dong Li
  • Hui-Xiong Li
  • Jing Li
Original Article

Abstract

Using the level-set method and the continuum interface model, the axisymmetric thermocapillary migration of gas bubbles in an immiscible bulk liquid with a temperature gradient at moderate to large Marangoni number is simulated numerically. Constant material properties of the two phases are assumed. Steady state of the motion can always be reached. The terminal migration velocity decreases monotonously with the increase of the Marangoni number due to the wrapping of isotherms around the front surface of the bubble. Good agreements with space experimental data and previous theoretical and numerical studies in the literature are evident. Slight deformation of bubble is observed, but no distinct influence on the motion occurs. It is also found that the influence of the convective transport of heat inside bubbles cannot be neglected at finite Marangoni number, while the influence of the convective transport of momentum inside bubbles may be actually negligible.

Keywords

Thermocapillary migration Bubble Level-set method 

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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • Jian-Fu Zhao
    • 1
    Email author
  • Zhen-Dong Li
    • 1
  • Hui-Xiong Li
    • 2
  • Jing Li
    • 1
  1. 1.Key Laboratory of Microgravity (National Microgravity Laboratory), Institute of MechanicsChinese Academy of SciencesBeijingChina
  2. 2.State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power EngineeringXi’an Jiaotong UniversityXi’anChina

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