Two-dimensional numerical simulation of thermal structure of urban polluted atmosphere (effects of aerosol characteristics)

Atsumasa Yoshida*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


A two-dimensional numerical simulation is carried out on the unsteady heat transfer in the urban polluted boundary layer containing aerosols. The effects of aerosols upon the thermal structure over the region including an urban area are studied in full consideration of radiative heat transfer. The results indicate the strong interaction among the distributions of air temperature, wind velocity and aerosol concentration in connection with the scattering and absorbing characteristics of aerosols. When the scattering of solar radiation by aerosols is predominant, the air temperature in urban area drops greatly, and the convergent flow to the urban area becomes weak, causing the aerosol concentration in urban areas to become high. When the absorption of solar radiation is predominant, the convergent flow to the urban area is not weakened. Air temperature drops near the Earth's surface, but the change in the upper air temperature is small.

Original languageEnglish
Pages (from-to)17-23
Number of pages7
JournalAtmospheric Environment - Part B Urban Atmosphere
Issue number1
Publication statusPublished - 1991
Externally publishedYes


  • Aerosol
  • atmospheric boundary layer
  • environmental heat transfer
  • flow field
  • numerical analysis
  • polluted atmosphere
  • radiative heat transfer
  • solar radiation
  • thermal structure
  • urban atmosphere

ASJC Scopus subject areas

  • Environmental Science(all)
  • Pollution
  • Engineering(all)
  • Earth and Planetary Sciences(all)


Dive into the research topics of 'Two-dimensional numerical simulation of thermal structure of urban polluted atmosphere (effects of aerosol characteristics)'. Together they form a unique fingerprint.

Cite this