Flow and heat transfer characteristics through a U-bend

被引：0

作者：

Kotb, NA ^{[1
]}

El-Moghazy, IM ^{[1
]}

Hegazy, AA ^{[1
]}

Mahmoud, MA ^{[1
]}

机构：

[1] Minia Univ, Fac Engn, El Minia, Egypt

来源：

FOURTH INTERNATIONAL SYMPOSIUM ON EXPERIMENTAL AND COMPUTATIONAL AEROTHERMODYNAMICS OF INTERNAL FLOWS, VOL II, PROCEEDINGS | 1999年

关键词：

U-bend; curvature ratio; turbulent flow; k-epsilon model; convective heat transfer;

D O I：

暂无

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

Flow and heat transfer characteristics through a U-bend are investigated in this paper. The complete governing differential equations are solved numerically using two turbulent models, the standard k-epsilon model and the near-wall k-epsilon model, (present mode). The present numerical results have been tested and evaluated against published experimental data. The present results indicate the advantage of present model over the standard k-epsilon model of turbulence. Theoretical investigation has been done to study the effect of Reynolds number and curvature ratio upon Nusselt number. This study showed that Nusselt number increases with the increase of Reynolds number and the decrease of curvature ratio in the curved portion and continue through the downstream tangent.

引用

页码：11 / 24

页数：14

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