NDLI: Interface shape and Marangoni effect around a bubble within the thermal boundary layer

Content Provider	Springer Nature Link
Author	Peng, X. F. Hu, H. Y. Ochterbeck, J. M.
Copyright Year	1992
Abstract	The characteristics of a vapor bubble within the thermal boundary layer were theoretically analyzed. The physical models accounting for the variation of interfacial tension and fluid density with temperature were proposed to investigate bubble interface aspects and the fluid flow around the bubble. The analyses demonstrated that the variation in interfacial tension results in variations in the liquid-vapor interface shape and bubble dynamics, which may play a significant role in the departure process of a vapor bubble from a heated wall surface. Increasing temperature gradients in the boundary layer and the gravitational field induce a contact line contraction and correspondingly promotes bubble departure. The simulation of liquid flow around the bubble shows that natural convection dominates the flow for earth conditions; however, the thermocapillary forces provide the principal catalyst for bubble departure in a microgravity environment. The results indicate that both the vapor bubble contraction and the Marangoni flow may increase the heat transfer around the vapor bubble and may cause the bubble to move away from the heating surface, further increasing heat transfer.
Starting Page	54
Ending Page	60
Page Count	7
File Format	PDF
ISSN	10032169
Journal	Journal of Thermal Science
Volume Number	7
Issue Number	1
e-ISSN	1993033X
Language	English
Publisher	Science Press
Publisher Date	1992-01-01
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	interfacial phenomenon marangoni effect bubble boiling Mechanics, Fluids, Thermodynamics Engineering Fluid Dynamics Engineering Thermodynamics, Transport Phenomena
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics

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