Capturing transients in turbulent flows over complex urban areas with passive or reactive scalars

DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.290
pages 260-263

Sasa Kenjeres
Transport Phenomena Section, Department of Chemical Engineering, Faculty of Applied Sciences, Delft University of Technology and J.M. Burgerscentrum for Fluid Mechanics, Delft, The Netherlands

M. van der Houwen
Faculty of Applied Sciences, Delft University of Technology, Leeghwaterstraat 39 6, 2628 CB Delft, The Netherlands

S. de Wildt
Faculty of Applied Sciences, Delft University of Technology, Leeghwaterstraat 39 6, 2628 CB Delft, The Netherlands

Resumo

The present study address numerical modelling and simulations of flow, turbulence and dispersion of a passive or reactive pollutants within and over complex urban areas including the laboratory-scale and full-scale applications. The special attention is devoted to capture transient flow features by introducing a seamless hybrid RANS/LES approach. This proved to be crucial in improving predictions of characteristic peaks of the turbulent kinetic energy in the wake regions, and consequently on overall improvement in predictions of the concentration field.