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A finite element solution to turbulent diffusion in a convective boundary layer
Author(s) -
Pai Prasad,
Tsang T. H.
Publication year - 1991
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.1650120206
Subject(s) - convective boundary layer , turbulence , mechanics , closure (psychology) , boundary layer , turbulence modeling , k epsilon turbulence model , plume , diffusion , k omega turbulence model , partial differential equation , finite element method , large eddy simulation , mathematics , physics , planetary boundary layer , meteorology , mathematical analysis , thermodynamics , economics , market economy
A second‐order closure turbulence model is used to simulate the plume behaviour of a passive contaminant dispersed in a convective boundary layer. A time‐splitting finite element scheme is used to solve the set of partial differential equations. It is shown that the second‐order closure model compares favourably with recent findings from laboratories, wind‐tunnel experiments and large‐eddy simulations. We also compare the second‐order closure model with the commonly used K ‐diffusion model for the same meteorological conditions. Case studies also show the effects of model parameters and turbulence variables on the plume behaviour.