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Heat Transfer Research
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ISSN Druckformat: 1064-2285
ISSN Online: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.v35.i12.110
7 pages

Structure of an Ascending Slug Flow in a Vertical Pipe

Oleg N. Kashinsky
Lab. of Physical and Chemical Hydrodynamics, Kutateladze Institute of Thermophysics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
R. S. Gorelik
Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Pr. Ac. Lavrentev, 1, Novosibirsk, 630090, Russia
V. V. Randin
Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia

ABSTRAKT

Experimental investigation of a slug gas-liquid flow in a vertical pipe was carried out. An electrochemical method was used to measure friction on the wall. A conductivity probe located on the pipe axis was used to separate gas slugs and liquid plugs. Signals from both probes were recorded simultaneously for various values of reduced gas and liquid velocities. Using the technique of conventional averaging, the flow structure in liquid plugs and at the time of passage of gas slugs was obtained. It is shown that in the beginning of a liquid plug there is a region of reduced friction, the length of which is approximately equal to twice the pipe diameter.


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