Identification of stratified liquid–liquid flow through horizontal pipes by a non-intrusive optical probe

The stratification during the simultaneous flow of two immiscible liquids through a horizontal conduit has been investigated. For the identification of different flow patterns, an indigenously developed unique optical probe has been used. The presence of different phase contents and various interfacial features along the optical path gives rise to attenuation and scattering and makes the identification possible. The probability density function (PDF) analysis and the wavelet multiresolution technique have been adopted for development of an objective flow-pattern indicator. The range of existence of the different stratified distributions as predicted by the indicator is in close agreement with the maps reported in literature.

[1]  B. Azzopardi,et al.  Drop size distributions in dispersed liquid-liquid pipe flow , 2001 .

[2]  Panagiota Angeli,et al.  Pressure gradient in horizontal liquid-liquid flows , 1999 .

[3]  Jinghai Li,et al.  Wavelet analysis of dynamic behavior in fluidized beds , 2001 .

[4]  D. P. Chakrabarti,et al.  Liquid‐Liquid Stratified Flow through Horizontal Conduits , 2005 .

[5]  Hsiaotao Bi,et al.  Characterization of dynamic behaviour in gas–solid turbulent fluidized bed using chaos and wavelet analyses , 2003 .

[6]  Neima Brauner,et al.  The role of interfacial shear modelling in predicting the stability of stratified two-phase flow , 1993 .

[7]  H. Bi,et al.  Influence of probe scale and analysis method on measured hydrodynamic properties of gas-fluidized beds , 2004 .

[8]  A dual optical probe for volume fraction, drop velocity and drop size measurements in liquid-liquid two-phase flow , 2000 .

[9]  Jean-Pierre Hulin,et al.  Liquid‐liquid flows in an inclined pipe , 1988 .

[10]  Panagiota Angeli,et al.  Flow structure in horizontal oil-water flow , 2000 .

[11]  Panagiota Angeli,et al.  Experimental studies on the dual continuous flow pattern in oil-water flows , 2004 .

[12]  Prasanta Kumar Das,et al.  Flow regime identification of two-phase liquid-liquid upflow through vertical pipe , 2006 .

[13]  Neima Brauner,et al.  Analysis of stratified/nonstratified transitional boundaries in horizontal gas—liquid flows , 1991 .

[14]  Subhabrata Ray,et al.  Pressure Drop in Liquid‐liquid Two Phase Horizontal Flow: Experiment and Prediction , 2005 .

[15]  A. Holmes,et al.  A local optical probe using fluorescence and reflectance for measurement of volume fractions in multi-phase flows , 2001 .

[16]  T. W. F. Russell,et al.  The effect of the less viscous liquid in the laminar flow of two immiscible liquids , 1959 .

[17]  Naoko Ellis,et al.  Hydrodynamics of three-phase fluidized bed systems examined by statistical, fractal, chaos and wavelet analysis methods , 2005 .

[18]  D. Mewes,et al.  Flow induced emulsification in the flow of two immiscible liquids in horizontal pipes , 1997 .

[19]  L. Galbiati,et al.  Horizontal oil-water flow in small diameter tubes, flow patterns , 1997 .

[20]  H. H. Bruun,et al.  An optical probe for measurements in liquid - liquid two-phase flow , 1997 .

[21]  G. W. Hodgson,et al.  The horizontal pipeline flow of equal density oil‐water mixtures , 1961 .

[22]  Jan Čermák,et al.  Diagnostics of gas—liquid flow patterns in chemical engineering systems , 1989 .

[23]  Neima Brauner,et al.  Analysis of stratified/non-stratified transitional boundaries in inclined gas-liquid flows , 1992 .