Urban Microclimate Scale CFD Simulation Daniel HII Jun Chung PhD Candidate, Department of Building, School of Design & Environment, NUS [email protected]Prof. WONG Nyuk Hien (Supervisor) [email protected]26 April 2016 2016 CAD-IT ANSYS Convergence - Singapore
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Urban Microclimate Scale CFD Simulation
Daniel HII Jun ChungPhD Candidate, Department of Building, School of Design & Environment, [email protected]
Link between grand societal challenges and urban physics focus areas. (Blocken, 2015)
Sketch of the urban boundary layer structure indicating the various (sub)layers and their names. (Rotach et al., 2004; modified after Oke, 1987)
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Introduction: Urban scales
Spatial and temporal scales of atmospheric phenomena and how these phenomena are treated in Reynolds-averaged Navier Stokes (RANS) mesoscale or obstacle resolving microscale models (right columns). (Blocken, 2015)
Schematic representation of the six spatial scales in urban physics, their typical maximum horizontal length scales and associated model categories. NWP = Numerical Weather Prediction; MMM = Mesoscale Meteorological Model; CFD = Computational Fluid Dynamics; BES = Building Energy Simulation; BC-HAM = Building Component e Heat, Air, Moisture transfer; MSM = Material Science Model; HTM = Human Thermophysiology Model. (Blocken, 2015)
-ANSYS CFD helps to solve design issues in the field of urban design, building and architecture(thermal comfort, urban morphologies, urban heat island).
-Better hexahedral + prism meshing for the field.-Availability of built material properties, models (thermal comfort), wizards (wind profile).-Realistic tree models (shading and evapotranspiration). -Better integration with mesoscale (Weather Research Forecasting), microscale (Urban Canopy Model) & building scale (EnergyPlus) simulations.