Effect of a local heater on natural convention of micropolar fluids in a square enclosures filled with a porous medium

• Main Authors: You-Jheng Ji, 紀侑政
• Other Authors: Tsan-Hui Hsu
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/78262745525874824469

碩士 === 國立高雄應用科技大學 === 機械與精密工程研究所 === 96 === Natural convection in heat transfer of micropolar fluids in a square enclosure with a local heater on left wall is numerically investigated in this study. The governing equations for micropolar fluid were first presented by A.C. Eringen, wherein we furthermore expand the applications to non-Newtonian fluids. The numerical computations were obtained using the cubic SADI (Spline Alternating-Direction Implicit Method) collocation method in a personal computer. The governing equations, including stream function, vorticity, microrotation and energy, were first put in dimensionless form. The governing parameters appearing in present study are Pr, Ra,Darcy and several micropolar parameters. The numerical results of the flow fields are discussed with plot of isotherms, streamlines and velocity vectors. The results indicate that the effect of convective heat transfer depends on the location of the local heater to a large extent.