کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10390442 884552 2014 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Large-scale structure alternation in rotating plane Poiseuille flow at transitional Reynolds number
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Large-scale structure alternation in rotating plane Poiseuille flow at transitional Reynolds number
چکیده انگلیسی
We performed a series of direct numerical simulations of transitional rotating Poiseuille flow, employing a large computational domain and discussed alternations of large-scale structures, such as the turbulent stripe and roll cell. The structure of the turbulent stripe is a laminar-turbulent banded pattern and the roll cell has an array of longitudinal vortexes aligning regularly in the spanwise direction. We observed the occurrence of turbulent stripes only under a low-rotation condition and the roll cells under high rotation. In the intermediate region, we found a transitional state from a static to a rotating system, which involved the coexistence of turbulent stripes and roll cells. In this study, we examined the process of disappearance of turbulent stripes and of the development of turbulent diffusion. A small net drag reduction can be achieved when relaminalization occurs and the turbulent stripe disappears on the suction side, although the drag increases monotonically once the roll cell dominantly affects the flow on the pressure side.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 72, Issue 1, 5 November 2014, Pages 70-81
نویسندگان
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