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A platform for research: civil engineering, architecture and urbanism
Validation of a Lattice Boltzmann model for snow transport and deposition by wind ; Validierung eines Lattice Boltzmann Modells für Schneetransport und -ablagerung durch Wind
Risk management became an important issue for many disciplines such as finance, insurance industry or mechanical and civil engineering. In the general framework of risk management, risk analysis and hazard prediction are fundamental preliminary steps. This contribution addresses the prediction of snow-wind hazard resulting from coupled dynamics of snow transport and deposition by wind, which is the key to the prediction of snow load profiles on buildings. The target of this work is the development of a detailed Computational Fluid Dynamics (CFD) model and its validation by means of wind tunnel data available for representative model geometries. This approach for load analysis allows to investigate problems, which are not sufficiently standardized in terms of design codes. For this purpose, a two dimensional numerical large eddy simulation (LES) model for transient snow transport by wind is suggested. The model based on the lattice Boltzmann method (LBM) has been developed and validated. The lattice Boltzmann method presented utilizes the Multiple Relaxation Time (MRT) model and fluid/wall boundary conditions of second order accuracy. In the current approach, dry snow is modeled as a continuous component, which is being advected by the turbulent transient flow field. Snow deposition and erosion are controlled by imposing rules for the influence of wall shear stress and equilibrium approaches for the terminal velocity of snowflakes. The numerical method is compared to the experimental studies which have been carried out by L. Sanpaolesi et al, in the Jules Verne Climatic Wind Tunnel of Nantes, France. These validation studies will be presented including sensitivity studies for various model parameters. Finally, potential extensions and shortcomings of this approach are discussed. ; In Disziplinen wie beispielsweise dem Finanz- und Versicherungswesen, dem Maschinenbau oder dem Bauingenieurwesen spielt das Risikomanagement eine grosse Rolle. Im Gesamtkonzept des Risikomanagements sind die Risikoanalyse und die ...
Validation of a Lattice Boltzmann model for snow transport and deposition by wind ; Validierung eines Lattice Boltzmann Modells für Schneetransport und -ablagerung durch Wind
Risk management became an important issue for many disciplines such as finance, insurance industry or mechanical and civil engineering. In the general framework of risk management, risk analysis and hazard prediction are fundamental preliminary steps. This contribution addresses the prediction of snow-wind hazard resulting from coupled dynamics of snow transport and deposition by wind, which is the key to the prediction of snow load profiles on buildings. The target of this work is the development of a detailed Computational Fluid Dynamics (CFD) model and its validation by means of wind tunnel data available for representative model geometries. This approach for load analysis allows to investigate problems, which are not sufficiently standardized in terms of design codes. For this purpose, a two dimensional numerical large eddy simulation (LES) model for transient snow transport by wind is suggested. The model based on the lattice Boltzmann method (LBM) has been developed and validated. The lattice Boltzmann method presented utilizes the Multiple Relaxation Time (MRT) model and fluid/wall boundary conditions of second order accuracy. In the current approach, dry snow is modeled as a continuous component, which is being advected by the turbulent transient flow field. Snow deposition and erosion are controlled by imposing rules for the influence of wall shear stress and equilibrium approaches for the terminal velocity of snowflakes. The numerical method is compared to the experimental studies which have been carried out by L. Sanpaolesi et al, in the Jules Verne Climatic Wind Tunnel of Nantes, France. These validation studies will be presented including sensitivity studies for various model parameters. Finally, potential extensions and shortcomings of this approach are discussed. ; In Disziplinen wie beispielsweise dem Finanz- und Versicherungswesen, dem Maschinenbau oder dem Bauingenieurwesen spielt das Risikomanagement eine grosse Rolle. Im Gesamtkonzept des Risikomanagements sind die Risikoanalyse und die ...
Validation of a Lattice Boltzmann model for snow transport and deposition by wind ; Validierung eines Lattice Boltzmann Modells für Schneetransport und -ablagerung durch Wind
Giangreco, Sara (author) / Krafczyk, Manfred C.
2010-10-28
Theses
Electronic Resource
English
Validation of a Lattice Boltzmann model for snow transport and deposition by wind
| UB Braunschweig | 2010
Validation of a Lattice Boltzmann model for snow transport and deposition by wind
| UB Braunschweig | 2010
Validation of a Lattice Boltzmann model for snow transport and deposition by wind
| TIBKAT | 2010