Question: For the fully developed laminar-pipe-flow solution of Prob. 4.34, find the axisymmetric stream function (r, z). Use this result to determine the average velocity V

For the fully developed laminar-pipe-flow solution of Prob. 4.34, find the axisymmetric stream function ψ(r, z). Use this result to determine the average velocity V = Q/A in the pipe as a ratio of umax.

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