Experimental study of the Taylor bubbles shear stress in an upward flow in a vertical tube
V.E. Nakoryakov, L.S. Timkin, R.S. Gorelik
Kutateladze Institute of Thermophysics SB RAS
timkin@itp.nsc.ru
Keywords: wall shear stress, double shear stress probe, slug flow, Taylor bubble, and electro-diffusional method
Pages: 281-292
Abstract
The modification of electrodiffusional method of the wall shear stress measurements is applied for registration of the Taylor bubble shear stress in an upward liquid flow. Time realization of shear is considered as a structure frozen into the flow, which moves together with a bubble. Experiments were carried out in laminar and transitional liquid flows. The wall shear stress in the liquid film around bubble averaged over the tube perimeter is presented for different flow Reynolds numbers and different lengths of the bubble.
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