Erratum: Thin liquid film structure and stability: The role of depletion and surface‐induced structural forces [J. Chem. Phys. 103, 6653 (1995)]

1996 ◽  
Vol 105 (11) ◽  
pp. 4892-4892 ◽  
Author(s):  
X. L. Chu ◽  
A. Nikolov ◽  
D. T. Wasan
Keyword(s):  
Liquid Film ◽  
Thin Liquid Film ◽  
Chem Phys ◽  
Film Structure ◽  
Structure And Stability ◽  
Structural Forces

scholarly journals On the origin of the circular hydraulic jump in a thin liquid film

2018 ◽  
Vol 851 ◽  
Author(s):  
Rajesh K. Bhagat ◽  
N. K. Jha ◽  
P. F. Linden ◽  
D. Ian Wilson
Keyword(s):  
Thin Film ◽  
Surface Tension ◽  
Liquid Film ◽  
Thin Liquid Film ◽  
Capillary Waves ◽  
Hydraulic Jumps ◽  
Planar Surface ◽  
Normal Impact ◽  
Viscous Forces

This study explores the formation of circular thin-film hydraulic jumps caused by the normal impact of a jet on an infinite planar surface. For more than a century, it has been believed that all hydraulic jumps are created due to gravity. However, we show that these thin-film hydraulic jumps result from energy loss due to surface tension and viscous forces alone. We show that, at the jump, surface tension and viscous forces balance the momentum in the liquid film and gravity plays no significant role. Experiments show no dependence on the orientation of the surface and a scaling relation balancing viscous forces and surface tension collapses the experimental data. A theoretical analysis shows that the downstream transport of surface energy is the previously neglected critical ingredient in these flows, and that capillary waves play the role of gravity waves in a traditional jump in demarcating the transition from the supercritical to subcritical flow associated with these jumps.

Analysis of Combined Buoyancy Effects of Thermal and Mass Diffusion on Laminar Forced Convection Heat Transfer in a Vertical Tube

1988 ◽  
Vol 110 (2) ◽  
pp. 337-344 ◽  
Author(s):  
T. F. Lin ◽  
C. J. Chang ◽  
W. M. Yan
Keyword(s):  
Liquid Film ◽  
Tube Wall ◽  
Thin Liquid Film ◽  
Convection Heat Transfer ◽  
Water System ◽  
Vertical Tube ◽  
Mass Diffusion ◽  
Laminar Mixed Convection ◽  
Laminar Forced Convection

This study investigates the role of vaporization of a thin liquid film on the tube wall in laminar mixed convection flows under the combined buoyancy effects of thermal and mass diffusion. Major nondimensional groups identified are GrT, GrM, Re, Pr, Sc, and φ. Results are specifically presented for an air–water system under various conditions. The effects of the liquid film temperature, the Reynolds number, and the relative humidity of the moist air in the ambient on the momentum, heat, and mass transfer in the flow are examined in great detail.

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