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Article information
2021 , Volume 26, ą 5, p.4-14
Meshkova V.D., Dekterev A.A., Litvintsev K.Y., Filimonov S.A., Gavrilov A.A.
The role of urban development in the formation of a heat island
Introduction. The configuration of modern micro districts leads to the formation of zones with low velocity, in which the accumulation of pollutants occurs. On the other hand, during the construction of cities, the surface of the Earth is covered with materials that actively absorb solar radiation, which leads to the formation of an urban heat island. Our work is devoted to the study of the local influence of urban development on the spread of pollutants, which takes into account the above mentioned factors. Mathematical model. For solving our problems we developed the microscale mathematical model based on the Reynolds-averaged Navier–Stokes equations for incompressible flows with variable density. For the correct calculation of the temperature on the surface of buildings, we used a model of conjugate heat transfer with a one-dimensional equation of thermal conductivity. As a model problem, we considered the Krasnoyarsk area with dense development and the presence of a highrise building for two seasons: winter and summer. The source of emission of pollutants was traffic. Results. The results of the calculations show a significant decrease in velocity around buildings. On the contrary, solar radiation leads to the intensification of free convective motion, especially in the surface area. That can double the near-surface velocity compared to the solution that does not account for the heat transfer. Conclusions. The developed mathematical model allows a comprehensive approach to solving hydrodynamic problems of prediction the ecological situation of cities.
[full text]
Keywords: hydrodynamics, aeration regime, urban microclimate, numerical modelling, SigmaFlow, convective motion, heat transfer
doi: 10.25743/ICT.2021.26.5.002
Author(s):
Meshkova Victoria Dmitrievna
Position: Student
Office: Institute of EngineeringPhysics and Radioelectronics of theSiberian Federal University
Address: 660041, Russia, Krasnoyarsk, Svobodnyy pr., 79
E-mail: vredel@sfu-kras.ru
SPIN-code: 2653-5120Dekterev Alexandr Anatolyevich
PhD.
Position: Senior Research Scientist
Office: Institute of Thermophysics SB of RAS
Address: 660090, Russia, Novosibirsk, avenue Akademika Lavrenteva,1
Phone Office: (391) 2494726
E-mail: dekterev@mail.ru
SPIN-code: 9100-0502Litvintsev Kirill Yurievich
PhD.
Position: Research Scientist
Office: Researcher of the Institute of Thermophysics of SB RAS
Address: 660036, Russia, Krasnoyarsk, Krasnoyarsk, Akademgorodok 50/44
Phone Office: (391) 2494726
E-mail: sttupick@yandex.ru
SPIN-code: 4034-9004Filimonov Sergey Anatolyevich
PhD.
Position: Research Scientist
Office: Siberian Federal University
Address: 660041, Russia, Krasnoyarsk, Svobodnyy pr., 79
E-mail: bdk@inbox.ru
SPIN-code: 5419-6323Gavrilov Andrey Anatolyevich
PhD.
Position: Research Scientist
Office: Krasnoyarsk branch of Institute of ThermophysicsSibirian Branch of Russian Academy of Sciences
Address: 660036, Russia, Krasnoyarsk, 50/44 Akademgorodok
Phone Office: (391) 2494726
E-mail: gavand@yandex.ru
SPIN-code: 3054-3567 References:
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Bibliography link:
Meshkova V.D., Dekterev A.A., Litvintsev K.Y., Filimonov S.A., Gavrilov A.A. The role of urban development in the formation of a heat island // Computational technologies. 2021. V. 26. ą 5. P. 4-14
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