Keywords: urban energy fluxes, solar radiation, 3D buildings, Spain, micro scale simulation, building morphology, computational fluid dynamics, CFD, modelling, weather forecasting, WRF model, energy balance, 3D shadow model, heat transfer, urban canopy model, solar radiation models, turbulence, turbulent fluxes, urban areas
Implementation of energy fluxes in EULAG with a new 3D shadow model
Micro urban simulations require high detail information. In order to take into account the building morphology, we have used a computational fluid dynamics (CFD) model named EULAG (UCAR) driven by the Weather and Research Forecasting System (WRF) through boundary conditions. A new three–dimensional urban solar radiation model (SHAMO) has been developed by the authors. We present results of the simulation obtained by using a modified version of the EULAG model which includes an energy balance equation to obtain the urban atmosphere/canopy energy exchange with the new 3D shadow model. The radiation model is coupled with the heat transfer equations from urban canopy model (UCM). The data produced by the urban solar radiation model has been used in large scale numerical experiments to simulate turbulent fluxes for urban areas; in this contribution over Madrid (Spain) city. Results of the micro scale simulations and sensitivity analysis will be presented in this paper.