09 فروردین 1403
احسان ايزدپناه

احسان ایزدپناه

مرتبه علمی: دانشیار
نشانی: دانشکده مهندسی - گروه مهندسی مکانیک
تحصیلات: دکترای تخصصی / مهندسی مکانیک
تلفن: 09133570349
دانشکده: دانشکده مهندسی

مشخصات پژوهش

عنوان A comprehensive investigation of vortex induced vibration effects on the heat transfer from a circular cylinder
نوع پژوهش مقالات در نشریات
کلیدواژه‌ها
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مجله INTERNATIONAL JOURNAL OF THERMAL SCIENCES
شناسه DOI
پژوهشگران احسان ایزدپناه (نفر اول) ، یاسر امینی (نفر دوم) ، علی عاشوری (نفر سوم)

چکیده

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 (U_r= 3, 4, 5, 6, 7, 8 and ?= 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 U_r= 4 and ?= 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 U_r=4, ?=0.