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Heat Transfer Research
Fator do impacto: 0.404 FI de cinco anos: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Imprimir: 1064-2285
ISSN On-line: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.v38.i5.70
pages 461-471

Hydrodynamic Structure of a Two-Phase Bubble Flow in a Horizontal Channel

Oleg N. Kashinsky
Lab. of Physical and Chemical Hydrodynamics, Kutateladze Institute of Thermophysics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
E. V. Kaipova
Institute of Thermal Physics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk

RESUMO

The results of an experimental research on the hydrodynamic structure of a two-phase bubble gas-liquid flow in a horizontal channel are presented. Measurements were carried out in a range of superficial liquid velocities 0.4−1 m/sec and consumption volumetric gas content up to 0.2. The hydrodynamic structure was measured by means of the electrochemical method using miniature sensors of friction and velocity. Complete records of realizations of wall friction signals, gas content, and liquid velocity at different points of the channel cross section were made during the experiments. As a result of digital processing of the recorded realizations, profiles of local gas content, liquid velocity, and relative root-mean-square fluctuations of velocity have been obtained. Values of tangential stresses on the upper and lower channel walls have been determined. They were compared with the measured pressure difference along the length of the working section. A substantial difference of the hydrodynamic flow structure in the upper and lower halves of the channel is shown.


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