An experimental investigation of the motion of single bubbles under a slightly inclined surface

Perron, Alexandre; Kiss, László I.; Poncsák, Sándor

doi:10.1016/j.ijmultiphaseflow.2006.02.001

Cited by 61 publications

(46 citation statements)

References 18 publications

(24 reference statements)

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“…The maximum and limiting heights of carbon-dioxide bubbles in molten cryolite are 4.19 mm and 3.95 mm* respectively. These values are close to the heights of air bubbles in water standing under a Plexiglass® surface, where the maximum height is 4.44 mm, and the limiting height is 4.18 mm (Perron et al, 2006a bubble. This sub-chapter reviews these results.…”

Section: Standing Babblessupporting

confidence: 78%

“…(2.49) Perron et al (2005Perron et al ( , 2006a made a wide range of experimental and theoretical studies on small bubbles rising in a liquid under a slightly inclined plate. They found that the terminal velocity increases with increasing bubble volume and angle of inclination, but the increase is not monotonous.…”

Section: Chenmentioning

confidence: 99%

“…Large bubbles do not interact with the bath the same way smaii ones do; there is a strong interaction between bubble size, shape, velocity and drag force (Perron et al, 2006a;Perron et al, 2005;Kiss et al, 2004;Chen et al, 1992). Based on measurements, the turbulence intensity in the wake of a bubble depends on its size and it increases with increasing size (Choi etal, 2002),…”

Section: Fortin Shaped Bubbles In the Cellmentioning

confidence: 99%

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Large bubble moving under a solid surface /

Vékony¹

2009

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Section: Standing Babblessupporting

confidence: 78%

Section: Chenmentioning

confidence: 99%

Section: Fortin Shaped Bubbles In the Cellmentioning

confidence: 99%

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Large bubble moving under a solid surface /

Vékony¹

2009

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“…For the bubble on the wetting film, the inertia may play the dominant role in controlling the movement. However, a recent study [12] showed that the viscous and surface tension forces play also a non-negligible role at both low bubble volumes and low inclination angles of the solid surface.…”

Section: Resultsmentioning

confidence: 99%

The influence of bubble shape and the thickness of the wetting film on the incremental electrical resistance caused by the presence of a single bubble in Hall-Héroult cells

2006

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Bubbles play an important role in the transport phenomena existing in an electrolysis cell. They increase the total ohmic resistance of the electrolyte but their contribution is still not well quantified. During their movement under the anode, the bubbles are separated from the solid by the so-called wetting film, that is by a thin liquid layer. In order to develop a mathematical model to compute the increment of the electrical resistance of the electrolyte due to the presence of several bubbles under the anode, the effects of the bubble shape and the thickness of the wetting film for a single bubble must be quantified a priori. In this first paper, these effects are computed using the finite element method (FEM). The results have shown that the influence of the bubble shape and that of the wetting film is small, about 5% and 2%, respectively.

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“…In comparison, those moving in constricted geometries have received less attention. Initial work focused on bubbles moving in vertical or inclined channels, later expanding to bubbles sliding under inclined flat plates [20][21][22]. The current study focuses on a single air bubble sliding under a heated inclined surface immersed in water.…”

Section: Introductionmentioning

confidence: 99%

Visualization of the wake behind a sliding bubble

et al. 2017

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In this work, Schlieren measurements are presented for the wake of an air bubble sliding under a heated, inclined surface in quiescent water to provide new insights into the intricate sliding bubble wake structure and the associated convective cooling process. This is a two-phase flow configuration that is pertinent to thermal management solutions, where the fundamental flow physics have yet to be fully described. In this work, we present an experimental apparatus that enables high-quality Schlieren images for different bubble sizes and measurement planes. By combining these visualizations with an advanced bubble tracking technique, we can simultaneously quantify the symbiotic relationship that exists between the sliding bubble dynamics and its associated wake. An unstable, dynamic wake structure is revealed, consisting of multiple hairpin-shaped vortex structures interacting within the macroscopic area affected by the bubble. As vorticity is generated in the near wake, the bubble shape is observed to recoil and rebound. This also occurs normal to the surface and is particularly noticeable for larger bubble sizes, with a periodic ejection of material from the near wake corresponding to significant shape changes. These findings, along with their implications from a thermal management perspective, provide information on the rich dynamics of this natural flow that cannot be obtained using alternate experimental techniques.

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An experimental investigation of the motion of single bubbles under a slightly inclined surface

Cited by 61 publications

References 18 publications

Large bubble moving under a solid surface /

Large bubble moving under a solid surface /

The influence of bubble shape and the thickness of the wetting film on the incremental electrical resistance caused by the presence of a single bubble in Hall-Héroult cells

Visualization of the wake behind a sliding bubble

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