کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7060855 1458697 2018 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A comprehensive investigation of vortex induced vibration effects on the heat transfer from a circular cylinder
ترجمه فارسی عنوان
یک بررسی جامع از اثرات ارتعاش ناشی از گردابه بر انتقال حرارت از سیلندر دایره ای
کلمات کلیدی
ارتعاش موجب ارتعاش، انتقال گرما همراه است سیلندر دایره ای سرعت کاهش یافته، نسبت دمیدن،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
In this paper, the effect of vortex induced vibration (VIV) on convective heat transfer from an elastically mounted rigid circular cylinder in cross-flow is investigated numerically. The motion of cylinder is modeled by using a mass-spring-damping system. The effect of reduced velocity and damping ratio on the vortex formation, vortex shedding process, cylinder displacement amplitude, Nusselt number and the position of maximum local Nusselt number is studied. In this study the Reynolds Number and the mass ratio are 150 and 2, respectively. Furthermore, different values of reduced velocity and damping ratio are investigated (Ur= 3, 4, 5, 6, 7, 8 andζ= 0. 0.01, 0.05, 0.1). The numerical results demonstrate that the reduced velocity and damping ratio can affect the heat transfer considerably. The beating phenomenon is occurs at Ur= 4 and ζ= 0.05 which leads to changes in the displacement amplitude and Nusselt number widely with respect to the time. In the beating phenomenon the total Nusselt number decreases in comparison with a stationary cylinder. The maximum heat transfer enhancement is obtained at Ur=4, ζ=0.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Thermal Sciences - Volume 125, March 2018, Pages 405-418
نویسندگان
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