Rizza, U. and Gioia, G. and Mangia, C. and Marra, G. P. (2003) Development of a grid-dispersion model in a large-eddy-simulation–generated planetary boundary layer. Il nuovo cimento C, 26 (3). pp. 297-309. ISSN 1826-9885
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Abstract
Numerical simulations of dispersion experiments within the planetary boundary layer are actually feasible making use of Large Eddy Simulations (LES). In Eulerian framework, a conservation equation for a passive scalar may be superimposed on LES wind/turbulence fields to get a realistic description of timevarying concentration field. Aim of this work is to present a numerical technique to solve the Eulerian conservation equation. The technique is based on Fractional Step/Locally One-Dimensional (LOD) methods. Advection terms are calculated with a semi-Lagrangian cubic-spline technique, while diffusive terms are calculated with Crank-Nicholson implicit scheme. To test the grid model, the dispersion of contaminants emitted from an elevated continuous point source in a convective boundary layer is simulated. Results show that the calculated concentration distributions agree quite well with numerical and experimental data found in the literature.
| Item Type: | Article |
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| Uncontrolled Keywords: | Convection, turbulence, and diffusion ; Air quality and air pollution |
| Subjects: | 300 Scienze sociali > 360 Problemi e servizi sociali; associazioni > 363 Altri problemi e servizi sociali > 363.7 Problemi ambientali (classificare qui la tutela ambientale; l’effetto dei rifiuti, dell’inquinamento, delle iniziative per controllarli) > 363.73 Inquinamento > 363.739 Inquinamento di specifici ambienti > 363.7392 Inquinamento atmosferico |
| Depositing User: | Marina Spanti |
| Date Deposited: | 13 Mar 2020 14:05 |
| Last Modified: | 13 Mar 2020 14:05 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/15124 |
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