کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
668646 1458768 2012 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical investigation of fluid flow and heat transfer of oscillating pipe flows
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Numerical investigation of fluid flow and heat transfer of oscillating pipe flows
چکیده انگلیسی

The RANS method with Saffman’s turbulence model was employed to solve the time-dependent turbulent Navier–Stokes and energy equations for oscillating pipe flows. The method of partial sums of Fourier series was used to analyze the harmonic velocity and temperature results. The complete structures of the oscillating pipe flows and the averaged Nusselt numbers on the tube wall were provided by numerical simulations over wide ranges of the Reynolds number and the Keulegan-Carpenter number. Present numerical results were validated by comparing the laminar flow results to analytic solutions and turbulence flow results to published experimental data. The effects of the governing parameters on the velocity, temperature, and Nusselt number distributions are discussed. The enhancement of the heat transfer due to oscillating flows has also been presented. The optimal ratio of the tube diameter over the oscillation amplitude was obtained based on the existence of a nearly constant optimal Keulegan-Carpenter number. The potential application of the present results in sea water cooling is also discussed.


► We do numerical study on fluid flow and heat transfer of oscillating pipe flows.
► We examine effects of governing parameters on velocity and temperature fields.
► The full structures of flow and heat transfer from laminar to turbulence are obtained.
► We find a nearly constant optimal ratio of the tube diameter over the oscillation amplitude.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Thermal Sciences - Volume 54, April 2012, Pages 199–208
نویسندگان
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