کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7053679 | 1458011 | 2018 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A numerical study of forced convection from an isothermal cylinder performing rotational oscillations in a uniform stream
ترجمه فارسی عنوان
یک مطالعه عددی از جابجایی اجباری از یک سیلندر ایزوترمال که نوسانات چرخشی را در جریان یکنواخت انجام می دهد
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Forced convection from a heated rotationally oscillating circular cylinder placed in a uniform cross flow of constant properties fluid is investigated. The two-dimensional governing equations of flow motion and energy are solved numerically on non-uniform polar grids using a higher order compact (HOC) formulation. The flow and thermal fields are mainly influenced by Reynolds number, Re, Prandtl number, Pr, maximum angular velocity of the cylinder, αm, and the frequency ratio, f/f0, which represents the ratio between the oscillation frequency, f, and the natural vortex shedding frequency, f0. The numerical simulations are performed at Re=200,Pr=0.5-1.0,αmâ[0.5,4.0] and f/f0â[0.5,3.0]. The resulting lock-on phenomena behind the cylinder is detected and thermal field is determined. Comparisons with previous numerical and experimental results verify the accuracy and the reliability of the present study. Variations in heat transfer coefficients within the lock-on ranges are investigated to build a connection between the heat transfer and the lock-on regimes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 127, Part B, December 2018, Pages 357-374
Journal: International Journal of Heat and Mass Transfer - Volume 127, Part B, December 2018, Pages 357-374
نویسندگان
H.V.R. Mittal, Qasem M. Al-Mdallal,