Opening Plenary Session
Mr. Klaus Jäckel, Daimler AG
Prof. Dr. Georg Ostermeyer, Technische Universität Braunschweig
Keynote Presentation 1 - Towards High-Resolution Simulation of Spatio-Temporal Fine Dust Dispersion in Urban Areas
Prof. Dr.-Ing. Manfred Krafczyk, Head of Institute, Institute for Computational Modelling in Civil Engineering, Technical University Braunschweig, Germany
Fine / break dust pollution is assumed to be detrimental to public health in urban areas. The main anthropogenic sources of such pollutants are traffic, manufacturing industry and power stations as well as heating systems of private households. In order to investigate the coupled dynamics of individualized traffic and fine dust dispersion due to local airflow on a building scale, we propose a coupled simulation approach. We propose a coupled modelling and simulation approach resulting in a high-resolution (down to the meter scale) coupled simulation approach coupling a Computational Fluid Dynamics (CFD) research code to a traffic model for individual cars in an urban area. Large scale meteorological conditions enter as boundary conditions for the Large Eddy CFD simulation (LES). As the simulation takes into account the individual buildings in an urban area, reliable local wind profiles can be predicted which are the main driver of fine dust dispersion. A cellular traffic model describing traffic dynamics provides the fine dust distribution which is being advected by the CFD model. The coupled model is implemented on General Purpose Graphics Processing Units (GPGPUs).
We provide preliminary feasibility studies of a comparison between individualized traffic modelling and a homogenized model on a street scale coupled to a mature CFD simulation based on a Cumulant Lattice Boltzmann approach (CLBM). To this end, the presented coupled simulation approach can serve as a starting point for more realistic scenarios.