Two-phase Simulation of Nanofluid in a Heat Exchanger in Turbulent Flow Regime
سال انتشار: 1393
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 925
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شناسه ملی سند علمی:
NCEEE01_014
تاریخ نمایه سازی: 25 مهر 1393
چکیده مقاله:
Turbulent forced convection of different nanofluids consisting of -Al2O3/water and CuO/water in a concentric double tube heat exchanger has been investigated numerically using two-phase approach. Nanofluids that are used as coolants flowing in the inner tube while hot pure water flows in outer tube. The study are conducted for Reynolds numbers ranging from 20,000 to 50,000 and nanoparticles volume fractions of 2, 3, 4 and 6 percent. The three-dimensional governing equations are discretized using the finite volume approach. Although, two different nanoparticles have almost the same thermal conductivity but using CuO/water nanofluid showing better enhancement in heat transfer that proves thermal conductivity is not the only reason of enhancing heat transfer. Also, CuO/water showing bigger shear stress in comparison of -Al2O3/water nanofluid. As a result, nanofluids showing higher overall heat transfer coefficient in comparison of pure water.
کلیدواژه ها:
Turbulent Forced Convection ، Nanofluid ، Two-phase Approach ، Concentric Double Tube Heat eExchanger
نویسندگان
M Nsiri Lohesara
Student of department of Mechanical Engineering Babol University of Technology, Babol, Iran
M Gorji Bandpy
Professor of department of Mechanical Engineering Babol University of Technology, Babol, Iran