On Mixed Convection in a Horizontal Channel, Viscous Dissipation and Flow Duality

被引:2
|
作者
Barletta, Antonio [1 ]
Celli, Michele [1 ]
Brandao, Pedro Vayssiere [1 ]
机构
[1] Alma Mater Studiorum Univ Bologna, Dept Ind Engn, Viale Risorgimento 2, I-40136 Bologna, Italy
关键词
mixed convection; viscous dissipation; stationary regime; parallel flow; analytical solution; VERTICAL CHANNEL; TEMPERATURE;
D O I
10.3390/fluids7050170
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
The conditions defining a stationary fluid flow may lead to a multiplicity of solutions. This circumstance is widely documented in the literature when mixed convection in a vertical channel or duct is accompanied by an important effect of viscous dissipation. Usually, there are double stationary solutions with a parallel velocity field which satisfy given temperature boundary conditions and with a prescribed mass flow rate. However, in a vertical internal flow, the dual solutions can be determined only numerically as they do not have a closed analytical form. This study shows that, in a horizontal channel, stationary mixed convection with viscous dissipation shows up dual flow branches whose mathematical expressions can be determined analytically. The features of these dual flows are discussed.
引用
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页数:13
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