کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7060700 1458693 2018 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermo-hydraulic transport characteristics of non-Newtonian fluid flows through corrugated channels
ترجمه فارسی عنوان
خصوصیات ترمو هیدرولیکی انتقال سیالات غیر نیوتنی از طریق کانال های راه
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
The present study investigates numerically the thermo-hydraulic transport characteristics of non-Newtonian fluids in corrugated channels. The power-law model is used to describe the constitutive behavior of the non-Newtonian fluid. The results indicate that the enhancement in heat transfer for corrugated channels over equivalent straight channel is not significant for smaller amplitude of the wall waviness of the channel, while there is a significant enhancement for the higher amplitude. The rate of enhancement with respect to equivalent straight channel decreases with increase in power law index and the decrement is more prominent for shear thinning fluids and for higher values of Reynolds number. Furthermore, an estimation of pressure drop for flow through the corrugated and equivalent straight channels has been made to compare the values against the enhancement in heat transfer rate. It reveals that the ratio of pressure drop (Δp/Δpstraight) is more as compared to the enhancement in heat transfer (Nu¯/Nu¯straight) for all the parameters considered in the present work. It further reveals that the use of shear thinning fluids is more suitable for the purpose of maximum heat transfer augmentation with minimum pressure drop. The results obtained from our studies may have significant consequences on the selection of wavy channel geometry configuration for compact heat exchanger handling non-Newtonian fluids towards a cost effective process of heat transfer.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Thermal Sciences - Volume 129, July 2018, Pages 201-208
نویسندگان
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