Walks of bubbles on a hot wire in a liquid bath

When a horizontal resistive wire is heated up to the boiling point in a subcooled liquid bath, some vapor bubbles nucleate on its surface. The traditional nucleate boiling theory predicts that bubbles generated from active nucleate sites grow up and depart from the heating surface due to buoyancy an...

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Bibliographic Details
Published in:Europhysics letters 2017-05, Vol.118 (4), p.44001
Main Authors: Duchesne, A., Caps, H.
Format: Article
Language:English
Subjects:
47.55.D
47.55.N
47.55.nb
Boiling points
Bubbles
Clustering
drops and bubbles
Fluid mechanics
interfacial flows
Marangoni convection
Mechanics
Nucleate boiling
Physical, chemical, mathematical & earth Sciences
Physics
Physique
Physique, chimie, mathématiques & sciences de la terre
thermocapillary flows
Wire
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Summary:When a horizontal resistive wire is heated up to the boiling point in a subcooled liquid bath, some vapor bubbles nucleate on its surface. The 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 terms of Marangoni effects.
ISSN:0295-5075
1286-4854
1286-4854
DOI:10.1209/0295-5075/118/44001