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Question: chemical engineering fluid mec ha 14 ang of varables and...

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Chemical Engineering Fluid Mec ha 14 Ang of varables and parameters that are important in pipe flow the Reynolds number: where V is the average velocity over the cross section in a pipe of diameter D p is the fluid density u is the fluid viscosity Comparing the numerator and denominator of the RHS of the equation with Equations 1.16 and L.ll shows that this group is a ratio of the convective (turbulent) momentum flux to the lamina momentum flux, or the ratio of (destabilizing) inertia forces to (stabilizing) viscous forces Thus, at low values of the Reynolds number, viscous forces dominate and the flow is smooth and stable (laminar, and at high Reynolds numbers, inertial forces dominate and the flow is unstable turbulent), It has been found that laminar flow occurs in a pipe only when the Reynolds number is less than about 2000. Calculate the maximum velocity and the corresponding volumetric flow raie (in cm%) at which laminar flow of air and water is possible in pipes with the following diametrns D-0.25,0.5, 1.0,2.0,4.0, 6.0, and 10.0 in. A layer of water is flowing down a flat plate that is inclined at an angle of 20 to thew If the depth of the layer is ¼ in, what is the shear stress exerted by the plate on to the vertical o (Remember stress is a 5. The relationcb dyad, with two directinn i l

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