โ Scribed by E. Van de Sande; John M. Smith
No coin nor oath required. For personal study only.
theory is given of the aeration produced by the impact of a high speed water jet on a water surface. Experimental verification agrees more than satisfactorily with the developed theory over a wide range. The boundary conditions for the theory have a physical meaning. The jet must be submitted to air friction forces (We > lo), and the accompanying air boundary layer must be laminar (Re, < 5 x 105). In the case of a turbulent boundary layer the same kind of analysis might be used, however at the moment no reliable solutions for a turbulent boundary layer are well established.
๐ SIMILAR VOLUMES
Correlating equations are developed for air entrainment by plunging water jets with velocities in the range between 2 and 5 m/set. Energy considerations are shown to be a good basis for predictive equations. Two diierent situations are distinguished depending on whether or not the jet is near its br
Air entrainment by vertical liquid plunging jets is considered. Mechanisms leading to the onset of entrainment are briefly discussed. New experimental data are collected for the two regions of the onset of entrainment: droplet and continuous jet regions. For the droplet region of entrainment an empi
The entrainment of air by a horizontal cylindrical roll rotating in a bath of liquid is considered. A simplified approach based on dimensionless analysis suggests that entrainment should occur at a critical value of the dimensionless capillary number, pU/u. Experiments on a range of viscous glycerol