TY - GEN

T1 - Seasonal variations of traffic-induced CO concentration in a city with a large river: A computational study

AU - Hrebtov, M.

AU - Hanjalić, K.

N1 - Funding Information: Acknowledgements: The work was supported by the Russian Science Foundation (Grant No. 17-77-10116). Publisher Copyright: © 2018 Begell House, Inc.

PY - 2018

Y1 - 2018

N2 - We report on numerical simulation of windless diurnal cycle of pollutant spreading over an urban terrain with a river running through the city, using a RANS algebraic flux model. The case mimics the real environment of Krasnoyarsk region (Russia). Two sets of conditions were considered: “winter” and “summer”. In both cases the simulation starts with stable (nocturnal) conditions with penetrative convection gradually developing over the daytime. The main difference between the two cases is in the temperature of the river surface relative to the surroundings. In winter the non-freezing river acts as a source of positive thermal buoyancy, while in summer the cool river at the daytime acts in the opposite way. The overall effect of the river appears significant enough to account for the observed winter accumulation of the pollutant in the city centre.

AB - We report on numerical simulation of windless diurnal cycle of pollutant spreading over an urban terrain with a river running through the city, using a RANS algebraic flux model. The case mimics the real environment of Krasnoyarsk region (Russia). Two sets of conditions were considered: “winter” and “summer”. In both cases the simulation starts with stable (nocturnal) conditions with penetrative convection gradually developing over the daytime. The main difference between the two cases is in the temperature of the river surface relative to the surroundings. In winter the non-freezing river acts as a source of positive thermal buoyancy, while in summer the cool river at the daytime acts in the opposite way. The overall effect of the river appears significant enough to account for the observed winter accumulation of the pollutant in the city centre.

UR - http://www.scopus.com/inward/record.url?scp=85077959922&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/4178b6e4-d4db-3f29-b6ea-9a40583a295f/

U2 - 10.1615/THMT-18.600

DO - 10.1615/THMT-18.600

M3 - Conference contribution

AN - SCOPUS:85077959922

SN - 9781567004687

T3 - Proceedings of the International Symposium on Turbulence, Heat and Mass Transfer

SP - 585

EP - 588

BT - THMT 2018 - Proceedings of the 9th International Symposium on Turbulence Heat and Mass Transfer

PB - Begell House Inc.

T2 - 9th International Symposium on Turbulence Heat and Mass Transfer, THMT 2018

Y2 - 10 July 2018 through 13 July 2018

ER -