Numerical investigation of natural convection heat transfer in a cavity utilizing Al2O3-water nanofluid: Effect of baffle height
DOI:
https://doi.org/10.56053/1.3.137Keywords:
Nanofluid, Natural convection, CavityAbstract
The objective of this work is to investigate numerically the single phase natural convective heat transfer in a cavity with baffle utilizing Al2O3-water nano fluid. The study is carried out numerically for a range of baffle heights, h=0.2, 0.5 and 0.8. Results are presented in the form of streamline and isotherm plots. The results show that heat transfer decreases considerably with increasing partition height. For the two-baffle cavity, as the height of baffle increases, separation in the vortices is seen and there is only conduction heat transfer between two baffles. Compared to the top-attached cavity, for the top-attached cavity, streamlines and isotherms are symmetric to the central line. For the two-baffle cavity, all the plots are symmetric to the central line.
References
-[1] Choi US.1995. Enhancing thermal conductivity of fluids with nanoparticles developments and application of non-Newtonian flows. ASME Journal of Heat Transfer. 66: 99-105.
-[2] Khanafer K, Vafai K and Lightstone M. 2003. Buoyancy- driven heat transfer enhancement in a two-dimensional enclosure utilizing nanofluids. International Journal of Heat and Mass Transfer. 46: 3639-3653.
-[3] Tian YS, Karayiannis TG. 2000. Low turbulence natural convection in an air-filled square cavity. Part I: the thermal and fluid flow fields. International journal of heat and mass transfer. 43: 849–866.
-[4] Santra AK, Sen S and Chakraborty N. 2008. Study of heat transfer augmentation in a differentially heated square cavity using copper-water nanofluid. International Journal of Thermal Science. 47: 1113-1122.
-[5] Putra N, Roetzel W and Das SK. 2003. Natural convection of nanofluids. Heat Mass Transfer. 39: 775- 784.
-[6] Anilkumar SH and Jilani G. 2008. Convective Heat Transfer Enhancement in an Enclosure with Fin Utilizing Nano Fluids. World Academy of Science, Engineering and Technology. 43: 98.
-[7] Habibzadeh A, Sayehvand H and Mekanik A. 2011. Numerical Study of Natural Convection in a Partitioned Square Cavity Filled with Nanofluid. International Journal of Chemical Engineering and Applications. 2: 269-274.
-[8] Sayehvand H, Habibzadeh A and Mekanik A. 2012. CFD analysis of natural convection heat transfer in a square cavity with partitions utilizing Al2O3 nanofluid. International Journal of Nano Dimensions. 2: 191-200.
-[9] De Vahl Davis G. 1983. Natural convection in a square cavity: A benchmark numerical solution. International Journal of Numerical Methods Fluids. 3: 249–264.
-[10] House JM, Beckermann C and Smith TF. 1990. Effect of a centered conducting body on natural heat transfer in an enclosure. Numerical Heat Transfer. 18: 213–225.
-[11] Merrikh AA and Lage JL. 2005. Effect of distributing a fixed amount of solid constituent inside a porous medium enclosure on the heat transfer process. International Journal of Heat and Mass Transfer. 48: 4748–4765.