کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7058832 | 1458078 | 2013 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Correlations and shape optimization in a channel with aligned dimples and protrusions
ترجمه فارسی عنوان
همبستگی و بهینه سازی شکل در یک کانال با محوره و پیشانی تراز
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
In this study, the friction factor and Nusselt number in a plate heat exchanger with dimples and protrusions were investigated according to geometric and operating conditions. The numerical results of a steady-state laminar model for the laminar region and a steady-state SST (shear stress transport) k-Ï turbulence model for the turbulent region were in good agreement with an unsteady analysis. For efficient analysis, a correlation for the critical Reynolds number was derived as a function of the geometric parameters. Based on these results, Nusselt number and friction factor correlations applicable to various geometric parameters and operating conditions (500 ⩽ ReH ⩽ 15,000) were obtained. Multi-objective optimization was carried out, where the objective function was a function of the normalized Nusselt number and normalized friction factor. To investigate the variation of the optimal points according to weighting factors, a Pareto front was generated using a micro-genetic algorithm. When JF factor was used as a single-objective function, the performance of the optimal point was enhanced by 28% compared with that of the reference model. The optimal point was independent of the Reynolds number.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 64, September 2013, Pages 444-451
Journal: International Journal of Heat and Mass Transfer - Volume 64, September 2013, Pages 444-451
نویسندگان
Jonghyeok Lee, Kwan-Soo Lee,