In flow over cylinders, why does the drag coefficient suddenly drop when the boundary layer becomes turbulent?

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In flow over cylinders, why does the drag coefficient suddenly drop when the boundary layer becomes turbulent? Isn’t turbulence supposed to increase the drag coefficient instead of decreasing it?

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Fundamentals of Thermal-Fluid Sciences

ISBN: 978-0078027680

5th edition

Authors: Yunus A. Cengel, Robert H. Turner, John M. Cimbala

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Question Posted: Dec 04, 2018 11:40 AM

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In flow over cylinders, why does the drag coefficient suddenly drop when the boundary layer becomes turbulent?

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Fundamentals of Thermal-Fluid Sciences

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