A Study of Natural Convection Heat Transfer in a Horizontal Square Enclosure Filled with Al2O3-Water Nanafluids

• Main Authors: De-Siou Chen, 陳德修
• Other Authors: Ching-Jenq Ho
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/98763496937868276915

碩士 === 國立成功大學 === 機械工程學系碩博士班 === 96 === The present study deals with natural convection heat transfer characteristics in a horizontal square enclosure filled with Al2O3-Water nanofluid. The enclosure is heated differentially across the two horizontal isothermal walls, while the other side-walls are thermally insulated. The heat transfer experiments for natural convection in the enclosure have been undertaken for the relevant parameters in the following range： temperature difference is 10℃, the volume fraction of nanoparticles is 0.1% ~ 4%,and the Prandtl number is 6.15 ~ 6.20.Numerical simulations corresponding to the experimental measurements have been performed to elucidate influence of thermophoresis and sedimentation of nanoparticles.Comparision between the measured heat transfer results and the numerical prediction has been made to valid at the numerical simulations