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Analysis of a poiseuille flow of an incompressible fluid between concentric circular cylinders

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Figure

Fig. 1. Geometry for Poiseuille flow between two concentric cylinders
Figure (2) shows that the graph of velocity profile is parabolic. This indicates thatas rR1, andrR2 ,0k2, the fluid velocity decreases and it is greatest at the centerline than near to slip boundaries. The graph also indicates as the gap between concentric cylinders decreases the fluid velocity decreases and the more close the fluid slips at the boundarythe less its velocity is affected by the slip length of boundary condition.  
Fig. 2. Velocity profiles
Fig. 4. Velocity profiles
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