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Entrainment of aerosol particles into the stratosphere by a hot thermal

Journal Article · · Fluid Dyn. (Engl. Transl.); (United States)
DOI:https://doi.org/10.1007/BF01050736· OSTI ID:6034660
; ;
The unsteady axisymmetric problem of transport of aerosol particles from the surface zone into the stratosphere by a hot thermal is numerically investigated. Since the velocity and thermal relaxation times of the small particles are much shorter than the other characteristic times of the process, the motion of the gas and particles was considered within the framework of a one-velocity and one-temperature model of the disperse medium. For the smoothed large-scale description of the resulting turbulent gas flows we used the Navier-Stokes equations with effective transport coefficients. Particle propagation is described by the turbulent diffusion equation. The model takes into account the compressibility of the medium, the effect of the dispersed phase on the dynamics of the process, the effect of the underlying surface on the formation of the dust column, and the development of the convective two-phase flow. The problem was solved numerically by a finite-difference method. The object of the calculations was to determine the particle fraction entrained into the stratosphere.
OSTI ID:
6034660
Journal Information:
Fluid Dyn. (Engl. Transl.); (United States), Journal Name: Fluid Dyn. (Engl. Transl.); (United States) Vol. 22:6; ISSN FLDYA
Country of Publication:
United States
Language:
English

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Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AEROSOLS
AIR POLLUTION
ATMOSPHERIC CIRCULATION
COLLOIDS
COMPRESSIBILITY
CONVECTION
DIFFERENTIAL EQUATIONS
DIFFUSION
DISPERSIONS
DUSTS
EARTH ATMOSPHERE
ENERGY TRANSFER
ENTRAINMENT
ENVIRONMENTAL TRANSPORT
EQUATIONS
FINITE DIFFERENCE METHOD
FLOW MODELS
FLUID FLOW
GAS FLOW
HEAT TRANSFER
ITERATIVE METHODS
MASS TRANSFER
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
NAVIER-STOKES EQUATIONS
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
POLLUTION
SOLS
STRATOSPHERE
TEMPERATURE EFFECTS
THERMAL DIFFUSION
TURBULENT FLOW
TWO-PHASE FLOW