A study on uneven street canyons on air flows and and pollutant dispersion along Taft avenue using CFD

Clicks: 2
ID: 287198
2024
Free PDF
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal
Emerging

Ranked #1,815 of 3,757 articles by views in Malay Journal

Most read Least read

Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 3,757 in total.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
This study focuses on assessing air pollution dispersion within street canyons, specifically along Taft Avenue in Metro Manila. The accumulation of pollutants in the city poses significant health risks in urban environments. By simulating airflow patterns and pollutant dispersion using computational fluid dynamics (CFD) models, this research aims to identify areas of high pollution concentration and hotspots. The methodology involves creating the model of Taft Avenue using Onshape CAD software, covering approximately 346 meters of the street canyon. A computational domain of 6, 4 and 6H height, width and length respectively is defined around the street canyon. The standard k-epsilon (k-ε) turbulence model is implemented in ANSYS Fluent, along with species transport models for pollutant dispersion. Mesh generation and boundary condition setup are implemented to analyze airflow along Taft Avenue. Mesh settings are adjusted to a finer resolution (from 40m to 3m), ensuring accurate representation of the geometry. Boundary conditions at the inlet specify a uniform velocity magnitude of 0.6 m/s, turbulent intensity of 10%, temperature of 300 Kelvin, and oxygen species concentration of 23%. The study shows that pollutant concentrations are higher near the road and under the LRT, particularly in street canyons and on the downwind side where pollutants are trapped by building walls. Windward areas experience lower pollution due to direct wind impact, creating high-pressure zones that disperse pollutants away from building surfaces. Ground-level recirculation zones trap pollutants, but their concentrations are lower due to more effective wind dispersion. Pollutants emitted by vehicles under the LRT become concentrated in these recirculation zones due to the physical barrier created by the LRT structure. Temperature differences, such as those from solar-heated building surfaces, contribute to vortex formation, further affecting pollutant dispersion.
Reference Key
persistent_1760660877_68f18d8d13eee Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Gonzales, Zyrille Ann Asido
Journal Malay Journal
Year 2024
DOI
DOI not found
URL
https://animorepository.dlsu.edu.ph/etdb_physics/25
Keywords Keywords not found

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.