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强化传热期刊
影响因子: 0.562 5年影响因子: 0.605 SJR: 0.175 SNIP: 0.361 CiteScore™: 0.33

ISSN 打印: 1065-5131
ISSN 在线: 1026-5511

强化传热期刊

DOI: 10.1615/JEnhHeatTransf.v18.i1.70
pages 81-90

NUMERICAL INVESTIGATION INTO THE HEAT TRANSFER ENHANCEMENT OF NANOFLUIDS USING A NONHOMOGENEOUS MODEL

Farshad Kowsary
Department of Mechanical Engineering, University College of Engineering, University of Tehran, Tehran 515-14395, Iran
Mohammad Mahdi Heyhat
School of Mechanical Engineering, University College of Engineering, University of Tehran, Tehran, Iran
Future; Ferdowsi university of mashhad, Department of mechanical engineering

ABSTRACT

A numerical study on the convective heat transfer of water-γ-Al2O3 nanofluids flowing through a two-dimensional (infinite depth) horizontal rectangular duct, where the top and bottom walls are two isothermal symmetric heat sources, has been performed. To do this, a nonhomogeneous two-component model has been used. All of the properties have been assumed to be temperature dependent as well as particle concentration dependent. The effects of the nonuniform distribution of particles on the heat transfer coefficient and wall shear stress have been shown. The results obtained illustrate that nonuniform distribution of the nanoparticles causes the enhancement of the heat transfer coefficient while the wall shear stress decreases when compared with the uniform volume fraction.


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