カスタマーログイン 0 ショッピングカート
ホーム 書籍 電子書籍 ジャーナル 参考文献と会報 著者、編集者、レビュー者 A-Z商品インデックス
Turbulence and Shear Flow Phenomena -1 First International Symposium

ISBN 印刷: 1-56700-135-1

A LOW-MACH-NUMBER MODEL OF THE COUNTER-GRADIENT DIFFUSION IN A TURBULENT SWIRLING FLAME

要約

It is found by an a priori test that the counter-gradient diffusion of the turbulent heat flux observed in a non-premixed swirling flame can be quantitatively explained by a new turbulence model of first-order closure type. The new model has been derived by applying the two-scale direct-interaction approximation to the low-Mach-number equations with the assumption that the variation of density is relatively small. It can be applied to general turbulent flows with the density variation, including the case where the Boussinesq approximation can not hold. The model expression of turbulent heat flux involves the term related to the mean pressure gradient in addition to the usual term of gradient diffusion type. This expression can also reproduce the vertical turbulent heat flux of the natural convection along a heated vertical plate, which can not be explained by the standard turbulence model of gradient diffusion type.
ホーム Begell Digital Portal Begellデジタルライブラリー ジャーナル 書籍 電子書籍 参考文献と会報 著者、編集者、レビュー者 A-Z商品インデックス 価格及び購読のポリシー Begell Houseの概要 連絡先 Language English 中文 Русский 日本語 Português Deutsch Français Español