The distance y from pipe boundary, at which the point velocity is equal to average velocity for turbulent flow, is (where R is radius of pipe) A. 0.223 R B. 0.423 R C. 0.577 R D. 0.707 R

April 15, 2024 by rawan239

all the points in a fluid. In turbulent flow, the point velocity is equal to the average velocity at a distance of $0.577 R$ from the pipe boundary. This is because the turbulent eddies are of a size comparable to the pipe radius, and the point velocity is equal to the average velocity at a distance of one-half the eddy size from the pipe boundary.

Option A is incorrect because the point velocity is not equal to the average velocity at a distance of $0.223 R$ from the pipe boundary. Option B is incorrect because the point velocity is not equal to the average velocity at a distance of $0.423 R$ from the pipe boundary. Option C is incorrect because the point velocity is not equal to the average velocity at a distance of $0.707 R$ from the pipe boundary.