Combined Heat and Mass Transfer by Mixed Convection From a Vertical Cylinder Embedded in a Porous Medium

• Main Author: 李光達
• Other Authors: 劉金源
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/61951689095149782971

碩士 === 國立中山大學 === 海洋環境工程研究所 === 85 === This thesis concerns the problem of combined heat and mass mixed convection heat transfer from a vertical cylinder embedded in a porous medium. The study is based upon the theorem developed by Adrian Bejan and Khairy R. Khair, F. C. Lai and F. A. Kulacki, Jin-Yuan Liu. By appling the volume averaging technicques, boundary layer theorem, Boussinesq approximation, and local non-similarity method, the effects of different domain, buoyancy ration, diffusivity ratio, curvature and convection ratio are examined and analyzed. Comparisons of the present results with the related references have found the similar trend. On the other hand, little references discuss about the influence of the mixed convection ratio on the transfer mechanism; the results of this thesis provide a supplement to the literature. Finally, a modified model on fluid flow in porous media is proposed for further development. The model is capable of describing the viscous and inertial effects. Some preliminary results of the flow field are presented and briefly discussed.