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Journal of Applied Electrochemistry

, Volume 24, Issue 7, pp 607–611 | Cite as

Investigation of the wall region of gas-liquid flow using an electrodiffusional technique

  • O. N. Kashinsky
Papers
  • 24 Downloads

Abstract

Measurements of the hydrodynamic characteristics of upward gas-liquid flow in an inclined channel were performed. Experiments were made by an electrodiffusional method using microprobes for wall shear stress and liquid velocity measurements. Special attention was paid to the study of two-phase flow structure in the vicinity of the wall. A strong effect of the channel orientation on the characteristics of the flow was demonstrated. The results show that maximum wall shear stress values correspond to an intermediate channel inclination. High values of near-wall void fraction result in the reduction of liquid velocity fluctuations in horizontal and near-horizontal channel positions.

Keywords

Wall Shear Stress Void Fraction Velocity Fluctuation Liquid Velocity Hydrodynamic Characteristic 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Nomenclature

f

frequency of fluctuations, Hz

Sτ

spectral density of wall shear stress fluctuations

u

liquid velocity (ms−1)

u1

intensity of liquid velocity fluctuations

uτ

friction velocity, (τw/ρ)/12 (m s−1)

V1, Vg

superficial liquid and gas velocities (m s−1)

y

distance from the wall (mm)

Greek symbols

α

local void fraction

β

gas flow rate ratio

ν

liquid viscosity (m2 s−1)

ρ

liquid density (kg m−3)

θ

angle of channel inclination (degree)

τw

wall shear stress (N m−2)

τ1

intensity of wall shear stress fluctuations (N m−2)

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References

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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • O. N. Kashinsky
    • 1
  1. 1.Institute of ThermophysicsNovosibirskRussia

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