Solution: Water is flowing in a pipe .15 m diameter. The pipe is horizontal, and flow is fully developed. The flow in the center of the pipe is turbulent, but the flow very close to the wall is laminar. A magnified velocity profile of the flow near the wall is whon at right. What is the shear stess at the wall? What is the pressure drop in a pipe 100 m long?

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Water is flowing in a pipe .15 m diameter. The pipe is horizontal, and flow is fully developed. The flow in the center of the pipe is turbulent, but the flow very close to the wall is laminar. A magnified velocity profile of the flow near the wall is whon at right. What is the shear stess at the wall? What is the pressure drop in a pipe 100 m long?