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2. Calculate the shear stress τxy at the wall in the fully-developed region for the three meshes. Calculate the corresponding value from fully-developed pipe analysis in HW6. For each mesh, calculate the % error relative to the analytical value. Include your
results as a table:
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3. At the exit of the pipe where the flow is fully-developed, we can define the error in the centerline velocity as



where uc is the centerline value from FLUENT and uexact is the corresponding exact (analytical) value. We expect the error to take the form



where the coefficient K and power p depend upon the order of accuracy of the discretization. Using MATLAB, perform a linear least squares fit of



to obtain the coefficients p and K. Plot ϵ vs. ∆r (using symbols) on a log-log plot. Add a line corresponding to the least-squares fit to this plot.

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