caa a22 4500 475777735 CHVBK 20180406123635.0 cr unu---uuuuu 170329e20000501xx s 000 0 eng 10.1023/A:1002653406071 doi (NATIONALLICENCE)springer-10.1023/A:1002653406071 An Advanced Puff Model Based On A Mixed Eulerian/Lagrangian Approach For Turbulent Dispersion In The Convective Boundary Layer [Elektronische Daten] [Umberto Rizza, Massimo Cassiani, Umberto Giostra, Cristina Mangia] An advanced model aimed at describing the problem of dispersion in theconvective boundary layer is proposed. The pollutant particles are groupedin clusters and modelled as Gaussian puffs. The expansion of each puff ismodelled according to the concept of relative dispersion and expressed interms of the spectral properties of the energy containing eddies of the turbulent field. The centre of mass of each puff is moved along a stochastic trajectory, obtained using a Lagrangian stochastic model and filtering the velocity with a recursive Kalman filter. At any instant, a filtering procedure, depending both on travel time and on puff size, acts to select spectral components involved in the expansion and in the meandering of the puff. Such an approach requires only a moderate number of puff releases, so that the proposed model is faster to run than a standard Lagrangian model. On the other hand, unlike the traditional puff model, it allows us to simulate both expansion and meandering of the puff. Therefore, it is well suited to simulate dispersion when the turbulent structures are larger thanthe plume dimensions, as for example in convective conditions. Being based onspectral formulations in both Eulerian and Lagrangian parts, the model is consistent in all the turbulent parameterizations utilised. Comparisons with a standard Lagrangian particle model as well as with a classical convective experimental dataset show good performance of the proposed model. Kluwer Academic Publishers, 2000 Air pollution modelling nationallicence Puff dispersion model nationallicence Lagrangian dispersion model nationallicence Rizza Umberto ISIATA/CNR, Lecce, Italy aut Cassiani Massimo Environmental Science Department, University of Urbino, Urbino, Italy aut Giostra Umberto ISIATA/CNR, Lecce, Italy aut Mangia Cristina ISIATA/CNR, Lecce, Italy aut Boundary-Layer Meteorology Kluwer Academic Publishers 95/2(2000-05-01), 319-339 0006-8314 95:2<319 2000 95 10546 https://doi.org/10.1023/A:1002653406071 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1002653406071 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rizza Umberto ISIATA/CNR, Lecce, Italy aut NATIONALLICENCE 700 1- Cassiani Massimo Environmental Science Department, University of Urbino, Urbino, Italy aut NATIONALLICENCE 700 1- Giostra Umberto ISIATA/CNR, Lecce, Italy aut NATIONALLICENCE 700 1- Mangia Cristina ISIATA/CNR, Lecce, Italy aut NATIONALLICENCE 773 0- Boundary-Layer Meteorology Kluwer Academic Publishers 95/2(2000-05-01), 319-339 0006-8314 95:2<319 2000 95 10546 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer