Development of gas dispersion within urban canyons considering turbulent flows outside surface layer

2014 Fiscal Year Final Research Report

• Project/Area Number: 25820289
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Architectural environment/Equipment
• Research Institution: Central Research Institute of Electric Power Industry
• Principal Investigator: MICHIOKA Takenobu 一般財団法人電力中央研究所, 環境科学研究所, 主任研究員 (20371370)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: ガス拡散 / 乱流構造 / 数値シュミレーション / 都市

Outline of Final Research Achievements

Large-eddy simulations were conducted to investigate the effect of the turbulent flows outside surface layer on the gas removal from the two-dimensional and three-dimensional street canyon. The results show that the mean concentration within the canyon increases as the fetch increases, and roughly reach a near constant value after fifth to seventh canyon. In addition, at the first and third canyons the low-momentum fluid does not always affect pollutant removal, but as the fetch increases the low-momentum fluid gradually affects pollutant removal.

Free Research Field

流体