کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
653125 1457488 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical simulation and optimization of turbulent nanofluids in a three-dimensional rectangular rib-grooved channel
ترجمه فارسی عنوان
شبیه سازی عددی و بهینه سازی نانوفیلدای آشفته در یک کانال سه بعدی مستطیل شکل
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی

In this study, numerical simulations by single and two-phase models of nanofluids turbulent forced convection in a three-dimensional rectangular rib-grooved channel with constant wall temperature are investigated. The elliptical, coupled, steady-state, three-dimensional governing partial differential equations for turbulent forced convection of nanofluids are solved numerically using the finite volume approach. The standard k − ε turbulence model is applied to solve the turbulent governing equations. The interactive influences of rectangular rib-groove geometrical ratios and nanofluid volume concentration on the average Nusselt number are provided in this study. The average Nusselt number of rib-grooved channel is found to improve more with smaller rib-grooved height ratios, and some ratios of rib-grooved pitch. Furthermore, the numerical results of the single and two-phase models show that there are some differences in simulated flow filed and turbulent convective heat transfer characteristics.In addition, the optimization of this problem is also presented by using the response surface methodology (RSM) and the genetic algorithm method (GA). The objective function E defined as the performance factor has developed a correlation function with four design parameters. It is found that the objective function E is better at Re = 10,000, and rectangular rib-grooved has an 18.2% enhancement.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Communications in Heat and Mass Transfer - Volume 66, August 2015, Pages 71–79
نویسندگان
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