کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6756911 | 1431089 | 2018 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Numerical study of turbulent flow fields around of a row of trees and an isolated building by using modified k-ε model and LES model
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Numerical study of turbulent flow fields around of a row of trees and an isolated building by using modified k-ε model and LES model Numerical study of turbulent flow fields around of a row of trees and an isolated building by using modified k-ε model and LES model](/preview/png/6756911.png)
چکیده انگلیسی
Turbulent flow fields over two typical urban elements, a row of trees with low packing density and an isolated building with high packing density, are investigated by a modified kâε model and a LES model. The applicability of these two models is evaluated by the validation metrics. Instantaneous flow fields are visualized by vortex cores and examined by quadrant analysis. In the wake region of the row of trees, predicted mean wind speed by the modified kâε model shows favourable agreement with the measured data, but turbulent kinetic energy is underestimated since the modified kâε model is not capable of simulating organized motions. In the wake region of the isolated building, both predicted mean wind speed and turbulent kinetic energy by the modified kâε model are slightly underestimated due to lack of the vortex shedding in the simulation. On the other hand, LES model well predicts both mean wind speed and turbulent kinetic energy since all large vortices are directly resolved by LES model.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Wind Engineering and Industrial Aerodynamics - Volume 177, June 2018, Pages 293-305
Journal: Journal of Wind Engineering and Industrial Aerodynamics - Volume 177, June 2018, Pages 293-305
نویسندگان
Yihong Qi, Takeshi Ishihara,