Thermocapillary Convection and Surface Fluctuation in a Liquid Bridge under Lateral Vibrations

Yang, Shuo; Liang, Ruquan; Yan, Fusheng; Gao, Taiyin; Feng, Yexin

doi:10.1007/s12217-014-9407-8

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…The oscillation period of the cellular flow is T 1/2 = 0.5 s. Compared with the φ = 0 • , the effect of the vortex core of cellular flow on the flow field at the hot or cold corner is more significant, as shown in figure 8(g) and (i). See [45] for a similar conclusion, the vortex core position of the cellular flow changes when a transverse acceleration is applied, which in turn affects the activity degree of the hot corner. Therefore, the initiation of oscillatory TCC is disturbed by the flow field at the hot corner with the gravitational tilt.…”

Section: Oscillating Tcc Under the Gtamentioning

confidence: 73%

Influence of gravitational tilt on the thermocapillary convection in a non-axisymmetric liquid bridge

Yang,

Zhang,

Cui

et al. 2024

New J. Phys.

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Fluid slosh caused by residual acceleration in microgravity is a common problem encountered in space engineering. To solve this problem, the ground-based experiment research on the influence of gravity jitter and gravitational tilt on the thermocapillary convection (TCC) transition behavior of non-axisymmetric liquid bridge has become an important issue in microgravity fluid management. Based on a mesoscale liquid bridge experimental platform which can realize gravitational tilt, the effect of gravitational tilt on TCC by using a high-speed camera equipped with a near-focus lens and a self-developed interface image recognition package. The results show that the spatio-temporal evolution of TCC by the influence of gravitational tilt is still divided into steady and oscillatory flow. In the stable TCC, the vortex core distortion of cellular flow caused by the imbalance left and right interface curvature invites cellular flow close to the free surface, and it shrinks to the intermediate height. As gravitational tilt increases, the transverse/longitudinal velocity peaks are significantly reduced, peak velocity has been reduced by 26-27%. Meanwhile, the longitudinal velocity gradient at the free interface increases significantly. Therefore, gravitational tilt plays an important role in improving the surface flow velocity. In the oscillatory TCC, the position of vortex core is closer to the free interface at the hot/cold corner as the periodic mutual occupation of the left and right cellular flows. The TCC is obviously inhibited due to the gravitational tilt. The critical temperature difference is increased by 25% and the onset of temperature oscillation at the hot corner is delayed by 20% compared with conventional gravity condition.

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Section: Oscillating Tcc Under the Gtamentioning

confidence: 73%

Influence of gravitational tilt on the thermocapillary convection in a non-axisymmetric liquid bridge

Yang,

Zhang,

Cui

et al. 2024

New J. Phys.

Self Cite

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show abstract

“…The results showed that, under vibration exposure, vibration movement occurs for a smaller critical temperature difference, which is associated with the in uence of vibrations on the shape of the free surface. The results presented in [45] show that in the presence of vibrations, the positions of the vortex centers in the radial and axial directions periodically deviate from their equilibrium positions.…”

Section: Introductionmentioning

confidence: 91%

The effect of using repetitively pulsed laser radiation in selective laser melting when creating a metal-matrix composite Ti-6Al-4V–B4C

Голышев

Маликов

Orishich

et al. 2021

Int J Adv Manuf Technol

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“…The free-surface bulged out at the two ends of the zone and bulged in at the central zone when the thermal Marangoni number was identical to the solutal Marangoni number. Yang, Liang, Yan, Gao, and Feng (2015) investigated thermocapillary convection and surface fluctuation in a liquid bridge under lateral vibrations which inhibited the surface flow.…”

Section: Introductionmentioning

confidence: 99%

The effect of aspect ratio and axial magnetic field on thermocapillary convection in liquid bridges with a deformable free-surface

Zhang

Huang

Zhang

et al. 2015

Engineering Applications of Computational Fluid Mechanics

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Three-dimensional numerical simulations are performed to analyze the effect of the aspect ratio Ar and axial magnetic field on thermocapillary convection in liquid bridges with deformable freesurface under microgravity, in which the volume of fluid (VOF) method is adopted to track the free-surface movement. The simulation results elucidate that the oscillation wave number m and frequency of temperature fluctuation decrease with increasing Ar, while the amplitude of temperature fluctuation increases with increasing Ar. The deformation ratio ξ of the free-surface increases as Ar increases. The numerical results also reveal that the axial magnetic field causes a concentration of convection vortexes near the free-surface and effectively suppresses the flow in both the radial and axial directions. Moreover, the axial magnetic field effectively damps free-surface deformation, so that the deformation ratio ξ decreases as the Hartmann number Ha increases. The temperature displays a uniform and linear distribution along the free-surface and the axis of molten zone when B a = 0.3 T. ARTICLE HISTORYintensity of the applied axial magmatic fields (T) Ca Capillary number, Ca =

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Thermocapillary Convection and Surface Fluctuation in a Liquid Bridge under Lateral Vibrations

Cited by 5 publications

References 13 publications

Influence of gravitational tilt on the thermocapillary convection in a non-axisymmetric liquid bridge

Influence of gravitational tilt on the thermocapillary convection in a non-axisymmetric liquid bridge

The effect of using repetitively pulsed laser radiation in selective laser melting when creating a metal-matrix composite Ti-6Al-4V–B4C

The effect of aspect ratio and axial magnetic field on thermocapillary convection in liquid bridges with a deformable free-surface

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