Natural convection and entropy generation in a nanofluid filled cavity with thick bottom wall: Effects of non-isothermal heating

被引：63

作者：

Bouchoucha, Abd El Malik ^{[1
]}

Bessaih, Rachid ^{[1
]}

Oztop, Hakan F. ^{[2
]}

Al-Salem, Khaled ^{[3
]}

Bayrak, Fatih ^{[4
]}

机构：

[1] Univ Freres Mentouri Constantine, Fac Sci Technol, Dept Mech Engn, LEAP Lab, Route Ain El Bey, Constantine 25000, Algeria

[2] Firat Univ, Technol Fac, Dept Mech Engn, Elazig, Turkey

[3] King Saud Univ, Coll Engn, Dept Mech Engn, Riyadh, Saudi Arabia

[4] Firat Univ, Tech Educ Fac, Dept Mech Educ, Elazig, Turkey

来源：

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES | 2017年 / 126卷

关键词：

Entropy generation; Natural convection; Nanofluid; Cavity; Thick wall; BUOYANCY-DRIVEN CONVECTION; SQUARE CAVITY; CONSTRUCTAL THEORY; AL2O3/WATER NANOFLUID; ENCLOSURE; OPTIMIZATION; TEMPERATURE; VISCOSITY; PATTERNS; FLOW;

D O I：

10.1016/j.ijmecsci.2017.03.025

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In the present work, entropy generation due to natural convection in nanofluid (water-Al2O3) filled a square cavity with thick bottom wall is studied numerically. The thick bottom wall of the cavity is heated via non isothermal heater, which has sinusoidal function, and top wall is cooled isothermally. The vertical walls are kept adiabatic. The finite volume method is used to solve the governing equations of flow and heat transfer. Results are presented in terms of streamlines, isotherms, local and average Nusselt numbers for Rayleigh number Ra (10(4)-10(6)), solid volume fraction of nanoparticles phi(0-0.1), and thickness of the bottom wall h*(0.05-0.15). The obtained results show that the average Nusselt number decreases with increasing of the bottom wall's thickness.

引用

页码：95 / 105

页数：11

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