植物群落内および都市キャノピー内の乱流モデルに関する研究 : (その2) 実験データとの比較によるモデルの検証

概要

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The numerical simulations of wind flow within and above plant and/or urban canopies are carried out using the turbulent model which was presented in the previous paper (Part 1). The new parameters introduced to the present turbulence model are examined in comparison with the field data of the corn canopies and the three-dimensional calculation of grid arrayed cubic blocks which are modelled as urban buildings. The following results are obtained. 1) The mean wind speed profiles vary with the new parameter C_<ρε> in the equation of energy dissipation rate. 2) The turbulent energy profiles vary with the parameter C_<γγ> in the equation of turbulent energy. 3) In case of calculating the flows of canopy, the same values of the standard (κ-ε) turbulence are available to model coefficients from the original (κ-ε) turbulence model.
1990-10-30