Numerical heat transfer enhancement using different nanofluids flow through venturi and wavy tubes

被引：24

作者：

Hatami, M. ^{[1
]}

Kheirkhah, A. ^{[1
]}

Ghanbari-Rad, H. ^{[1
]}

Jing, Dengwei ^{[2
]}

机构：

[1] Esfarayen Univ Technol, Dept Mech Engn, Esfarayen, North Khorasan, Iran

[2] Xi An Jiao Tong Univ, Int Res Ctr Renewable Energy, State Key Lab Multiphase Flow Power Engn, Xian 710049, Shaanxi, Peoples R China

来源：

CASE STUDIES IN THERMAL ENGINEERING | 2019年 / 13卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Nanofluid; Wavy tube; Venturi; Numerical modeling; Nusselt; NON-NEWTONIAN NANOFLUID; NATURAL-CONVECTION; MIXED CONVECTION; POROUS CAVITY; OPTIMIZATION; SIMULATION; PERFORMANCE; ENCLOSURE; PROFILE; SINK;

D O I：

10.1016/j.csite.2018.100368

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this study, the k-epsilon turbulence model with enhanced wall function using ANSYS commercial software is used for studying the effect of convergent/divergent sections on the heat transfer of nanofluids in two different cases. In first case, a venturi is modeled with different nanoparticles (SiO2, Al2O3 and CuO) and in second case, a wavy tube with different sinusoidal wall functions (sin(x/2), sin(x) and sin (2x)) is considered. Results of first case revealed that SiO2-water had the most surface Nusselt number among the other nanofluids and outcomes of second case confirmed that when the wave length is smaller (for sin (2x)) the temperatures near the walls increased and consequently the surface Nusselt number in peak areas are greater among other tested wall functions.

引用

页数：10

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