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Thermophysics and Aeromechanics

2006 year, number 3

Wall shear stress in an upward slug flow in a vertical tube

O.N. Kashinsky, A.S. Kurdyumov, and V.V. Randin
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
Pages: 381-385


This paper deals with wall shear stress in an upward gas-liquid slug flow inside a vertical tube. Local characteristics were measured by the electrodiffusion method. The method of conditional averaging over realization ensemble was used, and this allows distinguishing large-scale structures on the background of turbulent pulsation of liquid. While averaging, each slug velocity measured by a double probe of electric conductivity was taken into account. Averaged distributions of shear stress over the wall under a gas slug were obtained for different mode parameters.