Premium
Instantaneous concentration fluctuations in point‐source plumes
Author(s) -
Georgopoulos P. G.,
Seinfeld J. H.
Publication year - 1986
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690321008
Subject(s) - gaussian , variance (accounting) , turbulence , eulerian path , plume , convection–diffusion equation , point source , point (geometry) , mechanics , field (mathematics) , statistical physics , mathematics , mathematical analysis , physics , meteorology , lagrangian , geometry , optics , quantum mechanics , pure mathematics , business , accounting
A model for the variance σ c 2of instantaneous plume concentrations, at a level corresponding to that of the Gaussian formulas for the mean field, is developed and tested against available data. Starting from the Eulerian species transport equation, theoretical and empirical information is used to estimate parameters and simplify the form of the transport equation for σ c 2in a meandering frame of reference. Then, introduction of a localized production of fluctuations (LPF) scheme allows construction of analytical expressions for σ c 2that provide a direct means for calculating the concentration variance inside the instantaneous boundaries of plumes resulting from continuous point emissions in turbulent flows with uniform mean velocity.