Transient natural convection heat transfer of fluids with variable viscosity between concentric and vertically eccentric spheres

Horng Wen Wu, Wen Ching Tsai, Huann Ming Chou

研究成果: Article同行評審

19 引文 斯高帕斯(Scopus)

摘要

The transient natural convection has been analyzed for the temperature dependent viscosity of fluids in spherical annulus and between two vertically eccentric spheres. Using the modified Sorenson's method to generate the grid line can get the grid system with orthogonality along all boundaries. The grid system goes along with weighting function scheme to discretize the general governing equation. Numerical solutions were obtained for Rayleigh numbers (5.0 × 103-6.5 × 104) at a radius ratio of 2.0 with the dimensionless vertical eccentricity of the outer sphere (0- ± 0.65) for variable viscosity fluids at different Prandtl numbers (158, 405 and 720). The results of this analysis show that heat and flow patterns vary with the Rayleigh number and the eccentricity; besides, the effect of variable viscosity is investigated. The present calculations applied to constant viscosity are compared with the results of other papers, and these comparison results are agreeable.

原文English
頁(從 - 到)1685-1700
頁數16
期刊International Journal of Heat and Mass Transfer
47
發行號8-9
DOIs
出版狀態Published - 2004 4月

All Science Journal Classification (ASJC) codes

  • 凝聚態物理學
  • 機械工業
  • 流體流動和轉移過程

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