Sensitivity analysis of a concentration fluctuation model to dissipation rate estimates
by Andrea Amicarelli; Pietro Salizzoni; Giovanni Leuzzi; Paolo Monti; Lionel Soulhac; François-Xavier Cierco; Francis Leboeuf
International Journal of Environment and Pollution (IJEP), Vol. 48, No. 1/2/3/4, 2012

Abstract: Lagrangian dispersion models require estimates of the local dissipation rate (ε) of turbulent kinetic energy (κ). In this study, we evaluate the sensitivity of a Lagrangian model to different estimates of ε in simulating passive scalar dispersion in a turbulent boundary layer over a rough surface. Two different estimates of ε are used to simulate pollutant dispersion emitted by a linear elevated source with a Lagrangian model which integrates a macromixing and a micromixing scheme. Comparison between numerical and experimental results allows us to discuss the performance of the model and to define its sensitivity to ε.

Online publication date: Wed, 19-Nov-2014

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