Irreversibilities in various duct geometries with constant wall heat flux and laminar flow
作者： A SAHIN
DOI: 10.1016/S0360-5442(98)00010-3
关键词: Heat flux 、 Geometry 、 Laminar flow 、 Entropy (information theory) 、 Canalisation 、 Chemistry
摘要: Abstract A second-law comparison of irreversibilities is used to determine the optimum duct geometry which minimizes losses for a range laminar flows and constant heat flux. The geometries are circular, square, equilaterally triangular, rectangular with an aspect ratio 1/2, sinusoidal of 3 / 2 . Hydraulic diameters different geometries. circular best, especially when frictional contributions entropy generation become important. Triangular inferior choices both pumping power.
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