کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9691148 | 1457689 | 2005 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Large-eddy simulation of turbulent flow in a concentric annulus with rotation of an inner cylinder
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
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چکیده انگلیسی
Large-eddy simulations of the turbulent flow in a concentric annulus with inner wall rotation were performed at ReDh = 8900 for three rotation rates (N = 0.2145, 0.429 and 0.858). The main emphasis of this work was on the destabilization of the near-wall turbulent structures due to rotation of the inner wall. The turbulent structures close to the inner wall were scrutinized by computing the lower-order statistics. The anisotropy invariant map for the Reynolds stress tensor and the invariant function revealed that rotation of the inner wall altered the anisotropy of the turbulent structure. The probability density functions of the velocity fluctuations and the splat/anti-splat process were examined to create a more complete picture of the contributions of the flow events to turbulent production. The present numerical results indicate that the alteration of the turbulent structures can be attributed to the destabilizing effect of rotation of the inner wall, which gives rise to an augmentation of sweep and ejection events.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Fluid Flow - Volume 26, Issue 2, April 2005, Pages 191-203
Journal: International Journal of Heat and Fluid Flow - Volume 26, Issue 2, April 2005, Pages 191-203
نویسندگان
Seo Yoon Chung, Hyung Jin Sung,