Nongray radiative heat transfer analysis in the anisotropic scattering fog layer subjected to solar irradiation

Shigenao Maruyama, Yusuke Mori, Seigo Sakai

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

Radiative heat transfer in the fog layer is analyzed. Direct and diffuse solar irradiation, and infrared sky flux are considered as incident radiation. Anisotropic scattering of radiation by water droplets is taken into account. Absorption and emission of radiation by water droplets and radiative gases are also considered. Furthermore, spectral dependences of radiative properties of irradiation, reflectivity, gas absorption and scattering and absorption of mist are considered. The radiation element method by ray emission model (REM2) is used for the nongray radiation analysis. Net downward radiative heat flux at the sea surface and radiative equilibrium temperature distribution in the fog layer are calculated for several conditions. Transmitted solar flux decreases as liquid water content (LWC) in the fog increases. However, the value does not become zero but has the value about [formula presented]. The effect of humidity and mist on radiative cooling at night is investigated. Due to high temperature and humidity condition, the radiation cooling at night is not so large even in the clear sky. Furthermore, the radiative equilibrium temperature distribution in the fog layer in the daytime is higher as LWC increases, and the inversion layer of temperature occurs.

Original languageEnglish
Pages (from-to)361-375
Number of pages15
JournalJournal of Quantitative Spectroscopy and Radiative Transfer
Volume83
Issue number3-4
DOIs
Publication statusPublished - 2004 Feb 1

Keywords

  • Anisotropic scattering
  • Nongray
  • Radiative gases
  • Radiative heat transfer
  • Sea fog
  • Solar irradiation

ASJC Scopus subject areas

  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy

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