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TECHNICAL BRIEFS

The Classical Plane Couette-Poiseuille Flow With Variable Fluid Properties

[+] Author and Article Information
Asterios Pantokratoras

School of Engineering, Democritus University of Thrace, 67100 Xanthi, Greeceapantokr@civil.duth.gr

J. Fluids Eng 128(5), 1115-1121 (May 03, 2006) (7 pages) doi:10.1115/1.2238878 History: Received January 09, 2006; Revised May 03, 2006

A theoretical study of the effect of variable viscosity and variable thermal conductivity on the classical plane Couette-Poiseuille flow is presented in this brief communication. The investigation concerns engine oil, air, and water taking into account the variation of these quantities with temperature. The results are obtained with the numerical simulation of the governing equations and cover large temperature differences. Velocity and temperature profiles are presented as well as the volume flow rate and the heat flux between the plates. It is found that temperature profiles are close to the straight line for oil and water and depart significantly from the straight line for air due to nonlinear thermal conductivity. Dynamic viscosity plays an important role on the results which depart significantly from those of a fluid with constant properties.

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Copyright © 2006 by American Society of Mechanical Engineers
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Figures

Grahic Jump Location
Figure 3

Temperature and velocity distribution for water: Solid line, present work with variable properties: Dashed line solution for a fluid with constant properties

Grahic Jump Location
Figure 4

Variation of flow rate M and heat flux Q for oil and air: Solid line, present work with variable properties: Dashed line solution for a fluid with constant properties

Grahic Jump Location
Figure 5

Variation of flow rate M and heat flux Q for water: Solid line, present work with variable properties: Dashed line solution for a fluid with constant properties

Grahic Jump Location
Figure 2

Temperature and velocity distribution for air: Solid line, present work with variable properties: Dashed line solution for a fluid with constant properties

Grahic Jump Location
Figure 1

Temperature and velocity distribution for oil: Solid line, present work with variable properties: Dashed line solution for a fluid with constant properties

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