Transcription of Gaussian Plumes from “Point” Sources
{{id}} {{{paragraph}}}
1 GaussianPlumes from Point Sources Time averaged vs instantaneous Plumes Simplified steady-state plume model Eddy diffusion, advection/diffusion equation Gaussian point source plume model plume sigma values vs stability and distance plume reflection Non- Gaussian Plumes plume Rise; plume trajectories Buoyancy-induced dispersion Stack downwashView from below of Coning plume under neutral atmospheric conditionsSource: Slade et al Meteorology and Atomic Energy, 1968 instantaneoustime-averaged2 InstantaneousPlume ShapeTime-averaged plume ShapeFig 4-3, in Martin et alwindDescribing plume Concentrations3 Tim s Simple plume Modelhx123mass/timepassingpoint 1=mass/timepassing thrudisk area 2mass/timepassing thrudisk area 3C1 > C2> C3=Simplified Steady-State plume model *Pollutant is well mixed and confi
Simple Model #2: x z y X is the time-averaged wind direction, Y is the cross-wind direction, Z is the vertical dimension ( )( ) = [−] 3 m/sec m2 µg/sec m µg Gaussian Plume Model 1 2 In order to derive an equation describing the distribution of mass within the plume, we must first consider the transport of mass within a small control volume
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document:
{{id}} {{{paragraph}}}