標題: TRANSIENT NATURAL-CONVECTION HEAT-TRANSFER BETWEEN CONCENTRIC SPHERES
作者: CHU, HS
LEE, TS
交大名義發表
機械工程學系
National Chiao Tung University
Department of Mechanical Engineering
公開日期: 1-Sep-1993
摘要: The transient laminar natural convection heat transfer of fluids between two concentric isothermal spheres is investigated theoretically. The fluid is initially at rest and then the inner wall is subjected to a step change of temperature. The stream function/vorticity formulation is employed for the analysis because of the symmetry of the problem. The transient behavior of the flow field and its subsequent effect on the temperature distribution for different Rayleigh numbers and radius ratios are analyzed by finite difference methods. Forward differences are used for the time derivatives and second-order central differences for the space derivatives. The alternating direction implicit method is used for solution of the discretization equations. The results show that the Rayleigh number and radius ratio have a profound influence on the temperature and flow fields. The results of average Nusselt numbers are also compared with those of previous experimental and numerical investigations. Excellent agreement is obtained.
URI: http://hdl.handle.net/11536/2871
ISSN: 0017-9310
期刊: INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
Volume: 36
Issue: 13
起始頁: 3159
結束頁: 3170
Appears in Collections:Articles