Sulphuric acid is flowing through a pipe (2.5 inch diameter, 50 ft length) in a velocity of 0.006 m3 /s. The sulphuric acid has a viscosity of 25 mN.s/m2 and density of 1680 kg/m3 while the roughness of the pipe surface is 1.3 mm. If the operating temperature is 290K, determine fluid flow (i.e. laminar, turbulent or others). (Given that 1 m = 39.37 inch)

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5. Consider the problem of laminar, unidirectional flow in a pipe of radius a. Using the Navier- Stokes Equations: Solve for the velocity profile, u(r), in the pipe Calculate the maximum and bulk velocity (umax, ub) for this flow

a) (i) What are a Newtonian fluid and a -Newtonian fluid? Classify pendent non-Newtonian fluids and illustrate - flow time- behaviours in a diagram g. shear stress vs. shear (ii) across a flat plate and the s with the aid of a schematic diagram. Explain boundary concept for a flow

Air at 300 K flows across one side of a flat plate at a velocity of 15 m/s. The plate measures 2.0 m in the direction of flow and 1.0 m wide. If the surface temperature is 400 K, find the convective heat transfer. How much of the plate experiences laminar flow?

1. An incompressible fluid of kinematic viscosity v = μ/p= 10-4 m²/s flows steadily through a circular pipe of diameter d = 10 cm. The pipe flow is fully developed. Friction Factor If the average velocity V is 2 m/s, is the flow laminar or turbulent? What is the value of the friction factor, f? If the pipe is perfectly smooth on its internal surface and V is 20 m/s, the pipe flow is turbulent (double check yourself). Evaluate its friction factor using the Moody chart below. Repeat (c) by numerically solving the Colebrook formula (using, for example, Matlab). Attach the source code you used. Suppose that the pipe internal surface is rough. Also suppose that increasing V up to 200 m/s yields no change in the value of f found in (a). Determine the relative roughness, e/d, using the Colebrook formula. 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.015 0.01 Laminar Flow 64 Material Concrete, coarse Concrete, new smooth Drawn tubing Glass, Plastic Perspex Iron, cast Sewers, old Steel, mortar…

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