A model for roll waves in gas-liquid flow

Abstract A liquid film flowing co-currently with a high speed gas flow often consists of a slow moving base film containing a sequence of flow surges or roll waves. Experiments have been conducted to determine the profiles of height, wall shear stress and gas pressure for individual roll waves. On the basis of these measurements a physical interpretation of roll waves is given and a mathematical model is developed. The average properties of the liquid film are given by summing the contributions from the roll waves and from the base film.

[1]  G. F. Hewitt,et al.  The motion and frequency of large disturbance waves in annular two-phase flow of air-water mixtures , 1963 .

[2]  R. Dressler,et al.  Mathematical solution of the problem of roll-waves in inclined opel channels , 1949 .

[3]  D. E. Woodmansee,et al.  Mechanism for the removal of droplets from a liquid surface by a parallel air flow , 1969 .

[4]  Thomas J. Hanratty,et al.  Initiation of roll waves , 1961 .

[5]  M. A. Badri Narayanan,et al.  On the criteria for reverse transition in a two-dimensional boundary layer flow , 1969, Journal of Fluid Mechanics.

[6]  F. A. Schraub,et al.  The structure of turbulent boundary layers , 1967, Journal of Fluid Mechanics.

[7]  R. M. Nedderman,et al.  The motion and frequency of large disturbance waves in annular two-phase flow of air-water mixtures , 1963 .

[8]  Thomas J. Hanratty,et al.  Velocity gradients at the wall for flow around a cylinder at Reynolds numbers from 5 × 103 to 105 , 1969, Journal of Fluid Mechanics.

[9]  E. R. V. Driest.  On Turbulent Flow Near a Wall , 1956 .

[10]  Thomas J. Hanratty,et al.  Effect of waves at a gas—liquid interface on a turbulent air flow , 1968, Journal of Fluid Mechanics.

[11]  M. R. Head,et al.  Reversion of turbulent to laminar flow , 1968, Journal of Fluid Mechanics.

[12]  Donald E. Woodmansee,et al.  Base film over which roll waves propagate , 1969 .

[13]  P. M. Moretti,et al.  Heat transfer to a turbulent boundary layer with varying free-stream velocity and varying surface temperature—an experimental study , 1965 .

[14]  R. M. Nedderman,et al.  Pressure gradient and liquid film thickness in co-current upwards flow of gas/liquid mixtures: Application to film-cooler design , 1965 .