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Добірка наукової літератури з теми "Airflow in street canyons"

Автор: Grafiati

Опубліковано: 13 квітня 2024

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Дисертації з теми "Airflow in street canyons"

1

Glover, N. "Investigating the impact of trees on airflow within street canyons through the use of CFD and field measurements." Thesis, University College London (University of London), 2015. http://discovery.ucl.ac.uk/1472912/.

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Анотація:

The local wind climate within the urban environment plays a key role in the removal of heat and pollutants from pedestrian occupied areas as well as having an impact on pedestrian comfort and safety. One component of the urban landscape which is often neglected in the consideration of airflow is tree planting which can constitute a major component of the built environment. The aim of this research was therefore to gain a greater understanding into the effect of tree planting on airflow within street canyons and investigate the use of CFD modelling in predicting such effects. This aim was accom

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2

Maison, Alice. "Modélisation des impacts des arbres sur la qualité de l’air de l’échelle de la rue à la ville." Electronic Thesis or Diss., Marne-la-vallée, ENPC, 2023. http://www.theses.fr/2023ENPC0034.

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Les arbres apportent de nombreux services écosystémiques en ville, ils permettent de diminuer certaines conséquences de l’urbanisation comme l’îlot de chaleur urbain et le ruissellement de l’eau. Leur effet thermo-radiatif améliore le confort thermique. Les arbres peuvent également impacter la qualité de l’air en ville via différents processus. Le dépôt de polluants gazeux et particulaires sur les feuilles des arbres peut contribuer à la diminution des concentrations. Cependant, l’effet aérodynamique des arbres modifie l’écoulement dans les rues canyons et limite la dispersion des polluants ém

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3

Huang, Pong-Lai. "Modelling of air quality in street canyons /." View Abstract or Full-Text, 2003. http://library.ust.hk/cgi/db/thesis.pl?AMCE%202003%20HUANG.

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4

Yunkai, Yang. "Numerical study on flow and pollutant dispersion inside street canyons." Licentiate thesis, KTH, Installationsteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-118327.

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This thesis analyzes the characteristics of flow pattern and vehicle-emitted pollutant dispersion in roughness surface layer. In an urban environment, wind flow and transported-pollutant source interfere strongly with buildings and other roughness elements on the surface ground, which results in complex characteristics of flow pattern and pollutant dispersion in 3D circumstances. The present study intends to simplify the research domain and investigate the fundamental modeling problems that exist in the field. The current physical research topic is restricted to 2D street canyon in equilibrium

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5

Stachitas, Tucker Flagg. "Evaluation of 3-D radiant heat transfer in street canyons." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0041302.

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6

Wong, Ching-chi, and 黃精治. "Flow and pollutant dispersion over idealized urban street canyons using large-eddy simulation." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/206698.

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Flows and pollutant dispersion over flat rural terrain have been investigated for decades. However, our understanding of their behaviours over urban areas is rather limited. Most cases have either focused on street level or in the roughness sub-layer (RSL) of urban boundary layer (UBL). Whereas, only a handful of studies have looked into the coupling between street-level and UBL-core dynamics, and their effects on pollutant dispersion. In this thesis, computational fluid dynamics (CFD) is employed to examine the flows and pollutant transport in and over urban roughness. Idealised two-dimens

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7

Hall, Terianne C. "Predicting velocities and turbulent exchange in isolated street canyons and at a neighborhood scale." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/61867.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 127-130).<br>Urban planners need a fast, simple model to assess the impact of early design phase iterations of neighborhood layout on the microclimate. Specifically, this model should be able to predict the expected urban heat island intensity and the locations in neighborhood layouts that are prone to pollutant retention. Current models are inadequate for this purpose because they use computationally intensive techniqu

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8

Barbano, Francesco <1991&gt. "Characterization of turbulent exchange processes in real urban street canyons with and without vegetation." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amsdottorato.unibo.it/9452/1/barbano_francesco_tesi.pdf.

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Анотація:

Recent studies on turbulent exchange processes between the urban canopy layer and the atmosphere above have focused primarily on mechanical effects and less so on thermal ones, mostly by means of laboratory and numerical investigations and rarely in the real environment. More recently, these studies have been adopted to investigate city breathability, urban comfort and citizen health, with the aim to find new mitigation or adaptation solutions to air pollution and urban heat island, to enhance the citizen wellness. To investigate the small-scale processes characterizing vegetative and non-vege

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9

Rusticali, Valeria. "Confronto tra distribuzioni dimensionali di particelle misurate in due street canyons della città di Bologna." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/16780/.

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Анотація:

Il particolato atmosferico è uno degli inquinanti atmosferici principali in quanto esercita effetti importanti su clima, tempo meteorologico, visibilità, salute umana, ambiente e beni culturali. Nonostante i numerosi studi, la conoscenza dei processi fisici che lo governano risulta ancora limitata. L'obiettivo della presente tesi è stato quello di analizzare le distribuzioni dimensionali di particelle di aerosol raccolte tramite due contatori ottici di particelle nel periodo Gennaio-Febbraio 2018 in due diverse aree urbane (street canyons) di Bologna, al fine di confrontarne l'andamento tempor

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10

Polito, Martina. "Mean flow and turbulent exchange characteristics in real urban street canyons: the Lazzaretto case study." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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In the context of the European iSCAPE project (Improving the Smart Control of Air Pollution in Europe) an experiment was set up in order to test photocatalytic coatings effectiveness in reducing the concentration of pollutants. Further analysis on various aspects of the urban environment have been possible thanks to the experiment. The measurements collected during the experimental field campaign have been used to study the differences in the atmospheric phenomena due to the different morphology of two street canyons. Data in time periods characterized by non-synoptic conditions have bee

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