Open AccessHydrodynamic structure of the flow around a stationary gas bubble in an annular channel
Author(s) -
O. N. Kashinsky,
A. S. Kurdyumov
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2057/1/012036
Subject(s) - bubble , slug flow , shear stress , mechanics , capillary action , materials science , gas bubble , slug , flow (mathematics) , tube (container) , open channel flow , two phase flow , geology , composite material , physics , paleontology
Characteristics of the slug gas liquid flow in an annular channel were studied experimentally. The channel had the diameters of outer and inner tubes of 32 and 10 mm. The liquid flow was downward. The stationary bubble (gas slug) was produced by injecting air through a capillary tube. Wall shear stress measurements were performed by electrodiffusional technique. The measured circumferential distributions of wall shear stress demonstrated a strong non-uniformity across the channel. The highest liquid velocity was in the region of bridge streamining the bubble. The highest values of wall shear stress fluctuations are in the transition region between gas bubble and liquid bridge.