Drag of circular cylinders in the atmospheric turbulence

Yuji Ohya

doi:10.1016/j.fluiddyn.2003.10.002

Drag of circular cylinders in the atmospheric turbulence

Yuji Ohya

Division of Renewable Energy Dynamics

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

A field experiment on the drag of circular cylinders was conducted during the approach of typhoon T9806 towards Kagoshima, Japan. A rotatable drag-measurement facility was developed which could orient itself perpendicular to the mean wind, and was deployed in an open field. Using this facility, we have successfully evaluated the drag coefficients C_d of circular cylinders. The results show that the C_d values of cylinders in a highly turbulent flow in the atmosphere are approximately equal to those in a smooth flow in wind tunnel experiments. This implies that the cylinder drags in a large-scale turbulence are close to the values in a smooth flow.

Original language	English
Pages (from-to)	135-144
Number of pages	10
Journal	Fluid Dynamics Research
Volume	34
Issue number	2
DOIs	https://doi.org/10.1016/j.fluiddyn.2003.10.002
Publication status	Published - Feb 2004

All Science Journal Classification (ASJC) codes

Mechanical Engineering
Physics and Astronomy(all)
Fluid Flow and Transfer Processes

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10.1016/j.fluiddyn.2003.10.002

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title = "Drag of circular cylinders in the atmospheric turbulence",

abstract = "A field experiment on the drag of circular cylinders was conducted during the approach of typhoon T9806 towards Kagoshima, Japan. A rotatable drag-measurement facility was developed which could orient itself perpendicular to the mean wind, and was deployed in an open field. Using this facility, we have successfully evaluated the drag coefficients Cd of circular cylinders. The results show that the Cd values of cylinders in a highly turbulent flow in the atmosphere are approximately equal to those in a smooth flow in wind tunnel experiments. This implies that the cylinder drags in a large-scale turbulence are close to the values in a smooth flow.",

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AB - A field experiment on the drag of circular cylinders was conducted during the approach of typhoon T9806 towards Kagoshima, Japan. A rotatable drag-measurement facility was developed which could orient itself perpendicular to the mean wind, and was deployed in an open field. Using this facility, we have successfully evaluated the drag coefficients Cd of circular cylinders. The results show that the Cd values of cylinders in a highly turbulent flow in the atmosphere are approximately equal to those in a smooth flow in wind tunnel experiments. This implies that the cylinder drags in a large-scale turbulence are close to the values in a smooth flow.

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JO - Fluid Dynamics Research

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ER -

Drag of circular cylinders in the atmospheric turbulence

Abstract

All Science Journal Classification (ASJC) codes

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