Water flows through a two-dimensional diffuser having a 20° expansion angle as shown in Fig. P6.35. Assume that the flow in the diffuser can be treated as a radial flow emanating from a source at the origin O. (a) If the velocity at the entrance is 20 m/s, determine an expression for the pressure gradient along the diffuser walls. (b) What is the pressure rise between the entrance and exit?
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