کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
655218 1457630 2015 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Progress in the extension of a second-moment closure for turbulent environmental flows
ترجمه فارسی عنوان
پیشرفت در گسترش یک بسته شدن لحظه دوم برای جریانهای زیست محیطی آشفته
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
An advanced second-moment closure for the double-averaged turbulence equations of porous medium and vegetation flows is proposed. It treats three kinds of second moments which appear in the double-averaged momentum equation. They are the dispersive covariance, the volume averaged (total) Reynolds stress and the micro-scale Reynolds stress. The two-component-limit pressure-strain correlation model is applied to model the total Reynolds stress equation whilst a novel scale-similarity non-linear k-ε two-equation eddy viscosity model is employed for the micro-scale turbulence. For the dispersive covariance, an algebraic relation is applied. Model validation in several fully developed homogeneous porous medium flows, porous channel flows and aquatic vegetation canopy flows is performed with satisfactory agreement with the data.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Fluid Flow - Volume 51, February 2015, Pages 268-284
نویسندگان
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