Experimental investigation on Marangoni drop migrations using drop shaft facility

Xie, Junhua; Lin, Hai; Han, J.H.; Dong, Xian-Zi; Hu, Wenrui; Hirata, Akira; Sakurai, Minoru

doi:10.1016/s0017-9310(97)00360-8

Cited by 64 publications

(17 citation statements)

References 11 publications

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“…In the present study, we developed a reasonable and e cient code to calculate the thermocapillary migration of a drop driven by the temperature gradient. Some typical cases, investigated experimentally by Xie et al [4] and Hahnel et al [5], are calculated and compared with those experimental results, which conÿrms the reliability of the present approach.…”

Section: Introductionsupporting

confidence: 68%

“…The motion of liquid drops and gas bubbles driven by the temperature gradient is called thermocapillary migration or Marangoni migration. Since the pioneering work of Young et al [1], who derived the mathematical formula for the migration velocity of a spherical drop in a constant temperature gradient at small Reynolds and Peclet numbers by omitting the inertia force and convective energy transport, some succeeding work in this ÿeld has been performed experimentally, theoretically and numerically [2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…However, the migration velocities for the large diameter drops, e.g., 0.69 -2:38 mm [3], proved to be smaller than those predicted by the YGB model. Recently, Xie et al [4] also performed an experimental study of a drop Marangoni migration at intermediate Reynolds numbers in the microgravity environment. They found that the drop Marangoni migration velocity depends on the temperature gradient and the drop diameter, and is obviously smaller than that calculated by the YGB linear model.…”

Section: Introductionmentioning

confidence: 99%

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Numerical simulation of drop Marangoni migration under microgravity

Wang

Zhuang

et al. 2004

Acta Astronautica

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Thermocapillary motion of a drop in a uniform temperature gradient is investigated numerically. The three-dimensional incompressible Navier-Stokes and energy equations are solved by the ÿnite-element method. The front tracking technique is employed to describe the drop interface. To simplify the calculation, the drop shape is assumed to be a sphere. It has been veriÿed that the assumption is reasonable under the microgravity environment. Some calculations have been performed to deal with the thermocapillary motion for the drops of di erent sizes. It has been veriÿed that the calculated results are in good agreement with available experimental and numerical results.

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Section: Introductionsupporting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical simulation of drop Marangoni migration under microgravity

Wang

Zhuang

et al. 2004

Acta Astronautica

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“…[7][8][9] Xie et al performed a microgravity shaft experimental study of a drop Marangoni migration at intermediate Re 1 of O͑10͒. 10 They found that the drop migration velocities are much smaller than those of the YGB theory. On the fourth Shen-Zhou spaceship, Xie et al carried out experiments with larger values of Re 1 ͑up to 300͒ and Ma 1 ͑up to 5500͒.…”

Section: Introductionmentioning

confidence: 99%

Thermocapillary migration of nondeformable drops

Yin

Gao

et al. 2008

Physics of Fluids

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In this paper, we present a numerical study on the thermocapillary migration of drops. The NavierStokes equations coupled with the energy conservation equation are solved by the finite-difference front-tracking scheme. The axisymmetric model is adopted in our simulations, and the drops are assumed to be perfectly spherical and nondeformable. The benchmark simulation starts from the classical initial condition with a uniform temperature gradient. The detailed discussions and physical explanations of migration phenomena are presented for the different values of ͑1͒ the Marangoni numbers and Reynolds numbers of continuous phases and drops and ͑2͒ the ratios of drop densities and specific heats to those of continuous phases. It is found that fairly large Marangoni numbers may lead to fluctuations in drop velocities at the beginning part of simulations. Finally, we also discuss the influence of initial conditions on the thermocapillary migrations.

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“…Based on the years of ground-based research of the drop or bubble migration by means of matched-density and the facility of drop shaft [30,31] , the space experiment of drop thermocapillary migration at large Ma was performed on board the space ship Shen Zhou (SZ-4) of China in 2002 [32] . The experimental apparatus consisted of a test cell unit including drop injection system, optical diagnostics and illumination system, a recorder for data and video image recording, a controller unit and a power supply, as shown in Figure 5.…”

Section: Experiments Of Drop Marangoni Migrationmentioning

confidence: 99%

Space experimental studies of microgravity fluid science in China

Long

Kang

et al. 2009

Chin. Sci. Bull.

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Microgravity fluid physics is an important part of microgravity sciences, which consists of simple fluids of many new systems, gas-liquid two-phase flow and heat transfer, and complex fluid mechanics. In addition to the importance of itself in sciences and applications, microgravity fluid physics closely relates to microgravity combustion, space biotechnology and space materials science, and promotes the developments of interdisciplinary fields. Many space microgravity experiments have been performed on board the recoverable satellites and space ships of China and pushed the rapid development of microgravity sciences in China. In the present paper, space experimental studies and the main results of the microgravity fluid science in China in the last 10 years or so are introduced briefly. microgravity fluid physics, microgravity gas-liquid two-phase flow, microgravity complex fluid, microgravity combustion, space biotechnologyThe technologies of rockets and satellites require the study of the fluid management problem in the storage tanks, and such problems of microgravity engineering in the microgravity environment have been studied in China during the development of space technology [1] . Studies on microgravity sciences in China were started in the late 1980s, when the scientists completed some space experiments on board the Chinese recoverable satellites by the promotion of the National HighTechnology Research Program of China. Main research subjects were the scientific experiments of materials science, in charged by the experts of the Institute of Semiconductor of the Chinese Academy of Sciences (CAS) and the Lanzhou Institute of Physics [2][3][4] , and experiments of space biology, in charged by the experts of life sciences in the CAS [5][6][7] . Some nice results were obtained, although resources of space experiments on board the recoverable satellite were relatively limited in the preliminary period.Microgravity fluid physics is an import part of microgravity sciences, and requires relatively complicated experimental facility in general, mostly the optical diagnostic instrumentations. Theoretical and experimental studies of the microgravity fluid physics on the ground were started relatively early in China [8] ; the scientists of China and Japan jointly completed the microgravity experiments of the thermocapillary convection in floating half zone [9] and drop Marangoni migration [10] using the JAMIC drop shift in Hokkaido and the MGLAB drop shift in Toki respectively before the foundation of the Beijing Drop Tower, and the experimental results were nice. China's first space experiment of fluid physics was completed 10 years later after the initiation of one of the materials science. The experiments of Marangoni convection and thermocapillary convection in two immiscible liquid layers were performed on board the SJ-5

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Experimental investigation on Marangoni drop migrations using drop shaft facility

Cited by 64 publications

References 11 publications

Numerical simulation of drop Marangoni migration under microgravity

Numerical simulation of drop Marangoni migration under microgravity

Thermocapillary migration of nondeformable drops

Space experimental studies of microgravity fluid science in China

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