Home  /  Atmosphere  /  Vol: 10 Núm: 1 Par: January (2019)  /  Article
ARTICLE
TITLE

Qualitative and Quantitative Investigation of Multiple Large Eddy Simulation Aspects for Pollutant Dispersion in Street Canyons Using OpenFOAM

SUMMARY

Air pollution is probably the single largest environment risk to health and urban streets are the localized, relevant hotspots. Numerous studies reviewed the state-of-the-art models, proposed best-practice guidelines and explored, using various software, how different approaches (e.g., Reynolds-averaged Navier–Stokes (RANS), large eddy simulations (LES)) inter-compare. Open source tools are continuously attracting interest but lack of similar, extensive and comprehensive investigations. At the same time, their configuration varies significantly among the related studies leading to non-reproducible results. Therefore, the typical quasi-2D street canyon geometry was selected to employ the well-known open-source software OpenFOAM and to investigate and validate the main parameters affecting LES transient simulation of a pollutant dispersion. In brief, domain height slightly affected street level concentration but source height had a major impact. All sub-grid scale models predicted the velocity profiles adequately, but the k-equation SGS model best-resolved pollutant dispersion. Finally, an easily reproducible LES configuration is proposed that provided a satisfactory compromise between computational demands and accuracy.

 Articles related

Antonio Palacios, Ana Mellado and Yazmín León    

The city of Barcelona, like other cities in the world, suffers strong internal socio-economic inequalities in its neighborhoods. Numerous works have sought to detect, quantify, characterize, and/or map existing intra-urban differences, almost always base... see more

Revista: Urban Science

Gedinara Paiva dos Santos,Amanda Frederico Mortati,Luis Gustavo de Castro Canani,Leidiane Leão Oliveira    

Os igarapés urbanos são afetados pela supressão da floresta ripária o que ocasiona degradação ambiental. Devido às atividades antrópicas, esses ambientes são alterados e descaracterizados, sofrendo profundas mudanças em suas estruturas aquática e terrest... see more


Mohammad Amin Lasaiba    

The increasing need for settlement land has led to different suitability-based uses. This study evaluates land suitability for settlement, limiting factors, and development priorities. The methods used is qualitative with spatial analysis and quantitativ... see more


Iman Mukhaimin,Enggar Ayu Saraswati,Rahma Ajizah,Meilya Suzan Triyastuti    

These work aims are to determine the best condition extraction and product quality of quercetin from Carica papaya L flowers extract. The extraction of quercetin from Carica papaya L flowers had done by microwave-assisted extraction (MAE) method.  D... see more


Fitriana Nur Nasution,Aswarina Nasution,Ahmad Shafwan S Pulungan    

Marsidudu is a smoking process to accelerate the discharge of postpartum blood so that the body becomes healthy after childbirth. The ingredients used in the marsidudu come from plants. According to the Mandailing tribe, currently, the marsidudu has begu... see more

Revista: Jurnal Biosains