Lagrangian Dispersion Model for Nonneutrally Buoyant Plumes
نویسندگان
چکیده
منابع مشابه
Lagrangian simulation of the unsteady near field dynamics of planar buoyant plumes
The unsteady dynamics of planar plumes is investigated numerically with particular emphasis on the pulsating instability characterizing the source ~nozzle! near field. This instability manifests itself as the periodic shedding of vortical structures from the nozzle. The Lagrangian Transport Element Method is used to provide high resolution two-dimensional simulations of the unaveraged variable ...
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Buoyant plumes, evolving free of boundary constraints, may develop well-defined mushroom-shaped heads. In conventional plumes, overturning flow in the head entrains less buoyant fluid from the surroundings as the head rises, robbing the plume of its driving force. We consider here a new type of plume in which the source of buoyancy is an autocatalytic chemical reaction. The reaction occurs at a...
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Experiments on the onset of buoyant instabilities leading to periodic formation of vortical structures in planar buoyant plumes of helium and helium/air mixtures injected into quiescent air are reported for a range of nozzle widths (w520– 70 mm), plume fluid densities ~pure helium to that approaching air!, and velocities at the nozzle exit. First, the plume parameters corresponding to the onset...
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ژورنال
عنوان ژورنال: Journal of Applied Meteorology
سال: 2000
ISSN: 0894-8763,1520-0450
DOI: 10.1175/1520-0450(2000)039<0427:ldmfnb>2.0.co;2