Momentum and Heat Transfer Phenomena of Confined Spheroid Particles in Power-Law Liquids
Momentum and Heat Transfer Phenomena of Confined Spheroid Particles in Power-Law Liquids
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DOI：
10.1021/ie4032428
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发表时间：
2014-01
影响因子：
4.2
通讯作者：
C. Reddy;N. Kishore
中科院分区：
文献类型：
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作者：
C. Reddy;N. Kishore
在雷诺数Re为1-100、普朗特数Pr为1 - 1000、颗粒长径比e为0.5-2.5、壁面约束因子λ为2- 5、颗粒直径为1.5 ~ 1.5、颗粒直径为1.幂律流体行为指数n为0.4 ~ 1.8。一些关键的发现包括，在颗粒的后端处的再循环尾流的大小随着颗粒的纵横比和/或雷诺数和/或壁面因子的增加而增加。总阻力系数（Cd）随壁面系数、雷诺数和幂律指数的增大而减小。无论雷诺数和普朗特数的值，无论球状体颗粒的形状，平均努塞尔数的增加与降低幂律指数和/或与降低壁因子。
Effects of wall confinement and the power-law fluid behavior index on momentum and heat transfer phenomena of confined spheroid particles are numerically investigated over wide ranges of conditions such as the Reynolds number, Re, 1–100; Prandtl number, Pr, 1–1000; particle aspect ratio, e, 0.5–2.5; wall confinement factor, λ, 2–5; and power-law fluid behavior index, n, 0.4–1.8. Some of the key findings include that the size of the recirculation wake at the rear end of the particle increases with the increasing particle aspect ratio and/or Reynolds number and/or wall factor. The total drag coefficient (Cd) decreases with the increasing wall factor and/or Reynolds number and/or the decreasing power-law index. Regardless of values of the Reynolds and Prandtl numbers and regardless of the shape of the spheroid particles, the average Nusselt number increases with the decreasing power-law index and/or with the decreasing wall factor.