Numerical vs. turbulent diffusion in geophysical flow modelling

D'Isidoro, M. and Maurizi, A. and Tampieri, F. (2008) Numerical vs. turbulent diffusion in geophysical flow modelling. Il nuovo cimento C, 31 (5\6). pp. 813-824. ISSN 1826-9885

ncc9363.pdf - Published Version

Download (208kB) | Preview
Official URL:


Numerical advection schemes induce the spreading of passive tracers from localized sources. The effects of changing resolution and Courant number are investigated using theWAF advection scheme, which leads to a sub-diffusive process. The spreading rate from an instantaneous source is compared with the physical diffusion necessary to simulate unresolved turbulent motions. The time at which the physical diffusion process overpowers the numerical spreading is estimated, and is shown to reduce as the resolution increases, and to increase as the wind velocity increases.

Item Type: Article
Uncontrolled Keywords: Air quality and air pollution ; Tropospheric composition and chemistry, constituent transport and chemistry ; Atmospheric turbulence effects ; Convection, turbulence, and diffusion
Subjects: 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551.6 Climatologia e tempo atmosferico (Classificare qui i lo studio dei Cambiamenti climatici)
Depositing User: Marina Spanti
Date Deposited: 23 Mar 2020 17:14
Last Modified: 23 Mar 2020 17:14

Actions (login required)

View Item View Item