A simple and fast model to compute concentration moments in a convective boundary layer |
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| Institution: | 1. Chair of Building Physics, Swiss Federal Institute of Technology of Zurich, ETHZ, Zurich, Switzerland;2. Laboratory for Multiscale Studies in Building Physics, Swiss Federal Laboratories for Material Testing and Research, Empa, Dbendorf, Switzerland;1. Department of Civil and Environmental Engineering, University of South Florida, 4202 East Fowler Avenue ENB 118, Tampa, FL 33620, USA;2. Department of Structural Engineering, University of California, San Diego, 9500 Gilman Drive MC0085, La Jolla, CA 92093, USA;1. UPMC Univ. Paris 06, CNRS (UMR 8190), LATMOS-IPSL, Paris, France;2. UPS Univ. Toulouse 03, CNRS (UMR 5560), LA (Laboratoire d''Aérologie), Toulouse, France;3. Univ. Littoral Côte d''Opale & Univ. Lille Nord de France, CNRS (UMR 8101), LPCA (Laboratoire de Physico-Chimie de l''Atmosphère), Dunkerque, France;4. Ecole Polytechnique, CNRS (UMR 8539), LMD-IPSL, Palaiseau, France;5. Met Office, Exeter, United Kingdom |
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| Abstract: | Recently, a modified meandering plume model for concentration fluctuations in a convective boundary layer has been formulated (Atmos. Environ. 34 (2000) 3599). This model is based on a hybrid Eulerian–Lagrangian approach and it accounts for the skewed and inhomogeneous turbulence characteristics of the convective flow. Using the same hypotheses, but eliminating the need for Lagrangian particle model, we propose a generalised approach, that only requires the knowledge of mean concentration field. The proposed model is independent from the method used to obtain the mean concentration field. The evaluation of the concentration fluctuation field needs a computational time of only few seconds on a standard PC. Therefore, the model is suitable for practical applications. |
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