This article is cited in 11 papers

Theoretical and Mathematical Physics

Experimental verification of the early crisis of drag using a single sphere

N. N. Simakov

Yaroslavl State Technical University

Abstract: The recently discovered phenomenon of drag anomaly (early crisis) observed for droplets in a two-phase turbulent flow at transition Reynolds numbers (Re = 10–100) is experimentally supported in the case of a gas flow about a single hard sphere as well. Using a specially designed torsion balance, the drag force of a foam plastic sphere 3 mm in diameter placed in a blower-produced turbulent jet is measured. It is found that the turbulence of the flow about the sphere must be high for the drag anomaly to arise.

Received: 22.12.2008
Accepted: 16.12.2009

 English version: Technical Physics, 2010, 55:7, 913–919

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