每年出版 12 期
ISSN 打印: 1044-5110
ISSN 在线: 1936-2684
Indexed in
DROPLET FORMATION AND SIZE DISTRIBUTIONS FROM AN IMMISCIBLE INTERFACE IMPINGED WITH A VERTICAL NEGATIVELY BUOYANT JET
摘要
When an upward-flowing water jet impinges on an interface with an immiscible layer of lighter oil above it, the jet momentum lifts the interface and forms a cavity. Below a threshold based on Richardson number (Ri) and Reynolds number (Re), no droplets form. Above this threshold, oil drops are formed by two Richardson number-dependent mechanisms. At high Richardson number, an oil lip created at the edge of the cavity detaches to form oil droplets in the water below. At lower Richardson number, the water cavity becomes unstable and alternately collapses and reforms. As the collapsing cavity impacts the interface, it drags down fingers of the upper oil layer, which break into oil droplets. This article contains extensive droplet size distributions for varying Richardson number and Reynolds number and discusses the effects of varying viscosity ratio (h) and Morton number (Mo). Droplet sizes exhibit polydisperse log-normal distributions with mode diameters ranging from 0.6 to 1.5 mm. Characteristic diameters decrease primarily with increasing Re3/Ri, and to a lesser extent with decreasing viscosity ratio. Droplet distributions resulting from the lip pinch-off mechanism have a larger characteristic diameter than those formed by the cavity collapse mechanism.
-
Friedman Peter D., Meyer William J., Carey Steven, Experimental simulation of phase mingling in a subaqueous lava fountain, Journal of Geophysical Research, 111, B7, 2006. Crossref
-
Friedman P. D., Oscillation in Height of a Negatively Buoyant Jet, Journal of Fluids Engineering, 128, 4, 2006. Crossref
-
Shan Jerry W., Atsavapranee Paisan, Chang Peter A., Wilson Wesley M., Verosto Stephan, Characteristics of Fuel Droplets Discharged From a Compensated Fuel/Ballast Tank, Journal of Fluids Engineering, 128, 5, 2006. Crossref
-
Friedman P. D., Carey S., Raessi M., Influence of volatile degassing on initial flow structure and entrainment during undersea volcanic fire fountaining eruptions, Natural Science, 04, 12, 2012. Crossref
-
Li C., Miller J., Wang J., Koley S. S., Katz J., Size Distribution and Dispersion of Droplets Generated by Impingement of Breaking Waves on Oil Slicks, Journal of Geophysical Research: Oceans, 122, 10, 2017. Crossref
-
Cui Fangda, Boufadel Michel C., Geng Xiaolong, Gao Feng, Zhao Lin, King Thomas, Lee Kenneth, Oil Droplets Transport Under a Deep‐Water Plunging Breaker: Impact of Droplet Inertia, Journal of Geophysical Research: Oceans, 123, 12, 2018. Crossref
-
Friedman Peter D., Vadakoot Vidya D., Meyer William J., Carey Steven, Instability threshold of a negatively buoyant fountain, Experiments in Fluids, 42, 5, 2007. Crossref