Large-eddy simulation large-eddysimulation onscalartransferphenomena betweenurbansurfaceandatmosphere

Naoki Ikegaya, Aya Hagishimaand, Jun Tanimoto

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The authors performed a numerical simulation of scalar transfer phenomena between an urban surface and atmosphere. A parallelized large-eddy simulation model was adopted for the simulation. Two types of regular block arrays, a square array and staggered array, were arranged on the floor of computational domains. It was assumed that area scalar source was installed on the floor of arrays and scalar fluxes were estimated by using a wall function based on a logarithmic law. The results are summarized as follows. (l) The flow statistics of the normalized wind speed and turbulence intensity above a canopy showed good agreement with that obtained experimentally. (2) Scalar profiles shows self-similarity after 3rd rows. (3) Scalar boundary layer develops rapidly especially the edge of the scalar source area because of upward wind due to roughness.

Original languageEnglish
Pages (from-to)943-951
Number of pages9
JournalJournal of Environmental Engineering (Japan)
Issue number668
Publication statusPublished - Oct 2011

All Science Journal Classification (ASJC) codes

  • Environmental Engineering


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