標題: An investigation of natural convection in parallel square plates with a heated top surface by a hybrid boundary condition
作者: Fu, Wu-Shung
Wang, Wei-Hsiang
Li, Chung-Gang
機械工程學系
Department of Mechanical Engineering
關鍵字: Natural convection;Parallel square plates;Neighboring open boundaries;Low speed compressible flow;Absorbing boundary condition;Modified LODI method
公開日期: 1-十月-2014
摘要: Natural convection in parallel squares plats with a heated top surface is investigated numerically. For solving a problem induced by different directions between the thermal diffusion and main flow streams, a hybrid boundary condition composed of the absorbing boundary condition and local one-dimensional inviscid relations (LODI) method is then adopted in artificial buffer zones. Methods of the Roe scheme, preconditioning and dual time stepping matching the Monotone Upstream-centered Schemes for Conservation Laws (MUSCL) are used to solve low speed compressible flows caused by natural convection. The results show that the hybrid boundary condition successfully prevents the rebound of heat energy from the artificial buffer zone back to the domain. The area-averaged Nusselt numbers of this study are slightly larger than those of existing experimental results, and the averaged deviation is about 10%. (C) 2014 Elsevier Masson SAS. All rights reserved.
URI: http://dx.doi.org/10.1016/j.ijthermalsci.2014.04.009
http://hdl.handle.net/11536/147781
ISSN: 1290-0729
DOI: 10.1016/j.ijthermalsci.2014.04.009
期刊: INTERNATIONAL JOURNAL OF THERMAL SCIENCES
Volume: 84
起始頁: 48
結束頁: 61
顯示於類別:期刊論文