Airflow and dispersion around multiple buildings
نویسندگان
چکیده
A three dimensional, finite element-based, flow and dispersion model is used to simulate the transport and fate of hazardous releases in the atmosphere. Numerical results are presented for two experimental studies: (1) Airflow and dispersion over multiple blocks in a wind tunnel; and (2) Tracer study of a point release in the neighborhood of a building complex.
منابع مشابه
مطالعه تاثیر پوشش گیاهی و بام سبز بر افزایش سرعت باد و پراکنش آلاینده ها در درههای شهری با استفاده از دینامیک سیالات محاسباتی
Background and Objective: Increasing population growth and construction of high-rise buildings have doubled the amount of environmental pollution in the cities. Moreover, people use the open urban spaces more than before in order to meet their ecological needs. Accordingly, some parameters such as various vegetation and continuous winds streams can be considerably influential in transmittance o...
متن کاملPrediction of Wind Environment and Indoor/Outdoor Relationships for PM2.5 in Different Building–Tree Grouping Patterns
Airflow behavior and indoor/outdoor PM2.5 dispersion in different building–tree grouping patterns depend significantly on the building–tree layouts and orientation towards the prevailing wind. By using a standard k-ε model and a revised generalized drift flux model, this study evaluated airflow fields and indoor/outdoor relationships for PM2.5 resulting from partly wind-induced natural ventilat...
متن کاملCFD simulation of near-field pollutant dispersion in the urban environment: A review of current modeling techniques
Near-field pollutant dispersion in the urban environment involves the interaction of a plume and the flow field perturbed by building obstacles. In the past two decades, micro-scale Computational Fluid Dynamics (CFD) simulation of pollutant dispersion around buildings and in urban areas has been widely used, sometimes in lieu of wind tunnel testing. This paper reviews current modeling technique...
متن کاملAugmenting Simulations of Airflow around Buildings
Computational fluid-dynamics (CFD) simulations have become an important tool for the 10 assessment of airflow in urban areas. However, large discrepancies may appear when simulated 11 predictions are compared with field measurements because of the complexity of airflow behaviour 12 around buildings and difficulties in defining correct sets of parameter values, including those for inlet 13 condi...
متن کاملTransient Simulation of Airflow and Pollutant Dispersion Under Mixing Flow and Buoyancy Driven Flow Regimes in Residential Buildings
The distribution of airflow in a residential building varies with the periodic operation of a heating, ventilating and airconditioning (HVAC) system. Depending on the HVAC fan operation, mixing airflow (fan ON) or stratified airflow (fan OFF) occurs in the space. The objectives of this study are 1) to examine the time needed for room air to stabilize after a central ventilation fan turns ON/OFF...
متن کامل