Bubble leaping and slipping during subcooled boiling on thin wires

Lu, Junfu; Peng, Xiaofeng

doi:10.1016/j.ijthermalsci.2005.12.003

Cited by 16 publications

(6 citation statements)

References 16 publications

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“…1 are no more in contact with the wire surface and that a layer of liquid separates the bubble from the solid. This hypothesis is in agreement with observations made by Lu and Peng [18] in a partial wetting situation. Thus, a possible scenario is that microscopic bubbles (up to few tens of microns) nucleate on the wire surface and then depart from the wire surface but keep attracted by it.…”

Section: Resistive Wiresupporting

confidence: 94%

“…This question is not trivial: if the buoyancy leads to the bubble departure what is the force responsible for the attraction of the bubble towards the wire ? Indeed, the use of silicone oil guarantees a total wetting situation and so we can assume that a moving bubble is not in contact with the wire surface (this hypothesis is in agreement with the observations made by Lu & Peng [20] in partial wetting situation).…”

Section: Resistive Wiresupporting

confidence: 90%

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Walks of bubbles on a hot wire in a liquid bath

Duchesne¹,

Caps²

2017

EPL

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When a horizontal resistive wire is heated up to the boiling point in a subcooled liquid bath, some vapor bubbles nucleate on its surface. Traditional nucleate boiling theory predicts that bubbles generated from active nucleate sites, grow up and depart from the heating surface due to buoyancy and inertia. However, we observed here a different behavior: the bubbles slide along the heated wire. In this situation, unexpected regimes are observed; from the simple sliding motion to bubble clustering. We noticed that bubbles could rapidly change their moving direction and may also interact. Finally, we propose an interpretation for both the attraction between the bubbles and the wire and for the motion of the bubbles on the wire in term of Marangoni effects.

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Section: Resistive Wiresupporting

confidence: 94%

Section: Resistive Wiresupporting

confidence: 90%

Walks of bubbles on a hot wire in a liquid bath

Duchesne¹,

Caps²

2017

EPL

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“…Goel et al [2017] had attempted to study the effect of various surface properties like roughness and inclination angle on bubble behaviour. They used the bubble departure diameters and frequencies to calculate the nucleate boiling heat flux by using some empirical relations derived from their experiments in the subcooled range up to 20 K. Hao et al [2005] and Lu and Peng [2006] heated a micro-wire in the subcooled water (40 -60 K) and reported the leaping and slipping of bubbles. Thus, the review of the literature reveals that the formation of bubbles and their effect on the rate of heat transfer is a complex phenomenon, and depends on many parameters such as bulk temperature, working pressure, etc.…”

Section: Experimental Studies On Pool Boilingmentioning

confidence: 99%

Subcooled Pool Boiling on Ultra-thin Strips of Varying Cross-sections

Birhmana¹,

Sanjid²,

Pintoa³

et al. 2019

JEES

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The Boiling heat transfer phenomenon can be used for effectively cooling microelectronic chips. However, since these systems belong to such small length scales, and are in various shapes and sizes, the boiling phenomenon will be different from that observed in macro systems. The present study looks into the fundamental similarities/differences in the phenomenon by studying the growth of bubbles on ultra-thin strips. An experimental investigation is conducted to generate bubbles of various sizes on a unique double dog-bone shaped thin substrate. The growth and departure of the bubble generated on various sections of the substrate were studied. The bubbles observed on these different sections of an identical substrate were found to have considerable interdependency. Additionally, data generated is for very high subcooling that is not available in the literature. Bubble growth and departure model was developed, and preliminary results indicate improved bubble departure prediction capabilities across a wide range of subcooling.

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“…Qiu et al [2] observed the increased heat transfer due to the bubble sliding on a heated surface. For typical micro heat source such as thin heating wire, there exists many interesting phenomena, including bubble-top jet flow, bubble sweeping, bubble circling, bubble coalescence, bubble leaping, etc., during subcooled nucleate pool boiling [3][4][5][6][7][8][9][10]. Although obvious enhancement of boiling heat transfer can be achieved by bubble motion which is mainly due to the thermocapillary effect (or Marangoni effect) [11][12][13], the mechanisms of the bubble behaviors still need for further investigation.…”

Section: Introductionmentioning

confidence: 99%

“…For bubble motion and interaction along a thin wire during subcooled nucleate pool boiling, the interfacial thermocapillary force is thought to be the main contributor for the observed phenomena such as bubble coalescence and departure [6][7][8][9][10][11][12][13]. When a bubble slides with constant velocity, the thermocapillary force should be balanced by other forces, including the contact line force acting on a sweeping bubble [11] and the drag force due to the fluid viscosity [14,15].…”

Section: Introductionmentioning

confidence: 99%