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d) Explain very clearly why the drag force on a sphere decreases when the flow first turns turbulent.

d) Explain very clearly why the drag force on a sphere decreases when the flow first turns turbulent.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Fluid Mechanics II

c) In parallel flow on a smooth, flat plate, the flow eventually turns turbulent from laminar if the plate is long enough. We determine the location of this transition based on the critical Reynolds number. If we have flow around a cylinder (flow direction perpendicular to the cylinder axis), how do we determine where (at what point) on the cylinder circumference the flow turns turbulent? Explain clearly. d) Explain very clearly why the drag force on a sphere decreases when the flow first turns turbulent.
Transcribed Image Text:c) In parallel flow on a smooth, flat plate, the flow eventually turns turbulent from laminar if the plate is long enough. We determine the location of this transition based on the critical Reynolds number. If we have flow around a cylinder (flow direction perpendicular to the cylinder axis), how do we determine where (at what point) on the cylinder circumference the flow turns turbulent? Explain clearly. d) Explain very clearly why the drag force on a sphere decreases when the flow first turns turbulent.
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