Unsteady natural convection and statistical analysis in a CNT-water filled cavity with non-isothermal heating

被引：32
作者：
Rahman, M. M. [1 ,2 ]
Oztop, Hakan F. [3 ]
Steele, Michael [1 ]
Naim, A. G. [1 ]
Al-Salem, Khaled [4 ]
Ibrahim, Talaat A. [5 ,6 ]
机构：
[1] Univ Brunei Darussalam, Math & Comp Sci Grp, Fac Sci, BE-1410 Lebuhraya Tungku, Brunei
[2] Bangladesh Univ Engn & Technol, Dept Math, Dhaka 1000, Bangladesh
[3] Fzrat Univ, Fac Technol, Dept Mech Engn, Elazig, Turkey
[4] King Saud Univ, Engn Coll, Dept Mech Engn, Riyadh 11451, Saudi Arabia
[5] King Saud Univ, Vice Presidency Projects, Riyadh 11577, Saudi Arabia
[6] Helwan Univ, Fac Engn Mattaria, Mech Power Dept, Cairo 11718, Egypt
来源：
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 2015年 / 64卷
关键词：
Carbon nanotube; Non-isothermal heating; Natural convection; Finite element; Correlation analysis; TRANSFER ENHANCEMENT; NUMERICAL-SIMULATION; ENCLOSURE; NANOFLUIDS; AUGMENTATION;
D O I：
10.1016/j.icheatmasstransfer.2015.02.012
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A computational study has been done in this work to investigate the effects of CNT-water nanofluids in a cavity with non-isothermal heating for higher Rayleigh numbers. The cavity is heated non-isothermally from the bottom wall, it is cooled from the top and vertical walls are adiabatic. Unsteady governing equations of heat and fluid flow are solved via finite element method for different parameters as Ra and phi. A correlation analysis shows that, when controlling for phi and tau there was a significant correlation between Ra and Nu(m). When controlling for Ra and phi there was a negative significant correlation between tau and Nu(m). It is also found that there is an optimum value for nanofluid volume fraction to control heat transfer, temperature distribution and flow field. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：50 / 60
页数：11
相关论文
共 24 条
[1]   Numerical and Experimental Investigation of Heat Transfer of α-Al2O3/Water Nanofluid in Double Pipe and Shell and Tube Heat Exchangers [J].
Akhtari, M. ;
Haghshenasfard, M. ;
Talaie, M. R. .
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS, 2013, 63 (12) :941-958
[2]   Effects of moving lid direction on MHD mixed convection in a linearly heated cavity [J].
Al-Salem, Khaled ;
Oztop, Hakan F. ;
Pop, Ioan ;
Varol, Yasin .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2012, 55 (04) :1103-1112
[3]   Natural convection in enclosure with heating and cooling by sinusoidal temperature profiles on one side [J].
Bilgen, E. ;
Ben Yedder, R. .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2007, 50 (1-2) :139-150
[4]  
Choi S.U.S., 1995, Am Soc Mech Eng Fluids Eng Div FED, V231, P99
[5]   Magnetohydrodynamic Natural Convection of Nanofluids in U-shaped Enclosures [J].
Ghasemi, B. .
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS, 2013, 63 (06) :473-487
[6]   A review on natural convective heat transfer of nanofluids [J].
Haddad, Zoubida ;
Oztop, Hakan F. ;
Abu-Nada, Eiyad ;
Mataoui, Amina .
RENEWABLE & SUSTAINABLE ENERGY REVIEWS, 2012, 16 (07) :5363-5378
[7]   Numerical investigation of heat transfer enhancement using carbon nanotube-based non-Newtonian nanofluids [J].
Kamali, R. ;
Binesh, A. R. .
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2010, 37 (08) :1153-1157
[8]   Buoyancy-driven heat transfer enhancement in a two-dimensional enclosure utilizing nanofluids [J].
Khanafer, K ;
Vafai, K ;
Lightstone, M .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2003, 46 (19) :3639-3653
[9]   Convective heat transfer characteristics of CNT nanofluids in a tubular heat exchanger of various lengths for energy efficient cooling/heating system [J].
Kumaresan, V. ;
Khader, S. Mohaideen Abdul ;
Karthikeyan, S. ;
Velraj, R. .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2013, 60 :413-421
[10]   Combined Effect of Magnetic Field and Nanofluid Variable Properties on Heat Transfer Enhancement in Natural Convection [J].
Mahmoudi, Amir Houshang ;
Abu-Nada, Eiyad .
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS, 2013, 63 (06) :452-472
123