Results 171 to 180 of about 785 (214)
Holdup of Dispersed Phase in a Mixer-Settler Extraction Column
Journal of Chemical Engineering of Japan, 1990 Holdups in a stirred liquid-liquid dispersion were measured in a single-stage mixer-settler column equipped with a lifter turbine impeller. There was a large difference in dispersed phase holdup between the local positions above and below the impeller.
Katsuroku Takahashi, Hiroshi Takeuchi
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Phase Holdups in Three-Phase Semifluidized Beds and the Generalized Bubble Wake Model
Industrial & Engineering Chemistry Research, 2009A new experimental measurement methodology was proposed to characterize the hydrodynamics in gas−liquid−solid semifluidized beds. Using pressure drop measurements in the lower fluidized bed section and a tracer response technique in the upper fixed bed portion, the six phase holdup components of the reactor were determined simultaneously.
Schubert, M., Larachi, F.
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One-dimensional modelling of phase holdups in three-phase stratified flow
International Journal of Multiphase Flow, 1997Abstract This paper reports an investigation of the application of the three-fluid model to estimate phase holdups in three-phase stratified flow. A computer code (PRESBAL) was developed and used to apply the three-fluid model with a variety of assumptions regarding modelling of wall and interface shear stresses. Alternative definitions of equivalent
S.H. Khor +2 more
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Fluid maldistribution effects on phase holdups in three-phase fluidized beds
Chemical Engineering Science, 2001Abstract Effects on the phase holdups and overall bed voidage of gas and liquid maldistribution due to partial blockage of the distributor and due to their premixing below the distributor have been determined for three-phase fluidized beds in a 127-mm-diameter column.
DongHyun Lee +3 more
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A mechanistic model for phase holdup predictions in a three-phase fluidized bed
Chemical Engineering Science, 1991Abstract A mechanistic model developed based on modification of the concept underlying the classical wake model (CWM), more specifically the generalized wake model, is presented to account for the phase holdup behavior in gas—liquid—solid fluidized beds.
Rong-Her Jean, Liang-Shih Fan
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Gas holdup in a three-phase magneto-fluidized bed
Chemical Engineering Science, 1999The influence of magnetic field on local gas holdup, e g and average gas holdup e g has been studied in a three-phase (gas-liquid-solid) magneto-fluidized bed using electroresistivity probe technique and quick closing valve technique, respectively.
R.L. Sonolikar +2 more
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Ultrasonic Technique For Measuring Phase Holdups In Multiphase Systems
Chemical Engineering Communications, 2005ABSTRACT An ultrasonic technique is being developed to detect the dispersed phase holdups in multiphase systems. This technique is based on the fact that the transmission time and attenuation of ultrasound in suspensions differ from those in pure liquids.
MAYTINEE VATANAKUL +2 more
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Local phase holdups in gas‐solids fluidization and transport
AIChE Journal, 2001Abstract A two‐phase structural model consisting of a dense phase and a dilute phase with allowance for the dense‐phase expansion and the solids holdup in the dilute phase was developed and successfully applied to the analysis of local voidage fluctuation signals.
Hsiaotao T. Bi, Peng‐Cheng Su
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Gas holdup in a three-phase fluidized-bed bioreactor
Applied Biochemistry and Biotechnology, 1990The effects of system parameters on the gas holdup in a three-phase fluidized-bed bioreactor were examined. A valve technique was used to measure the average gas holdup in the reactor. Gas holdup was found to be strongly affected by fluid superficial velocities, bead size and density, electrolyte concentration, type of gas sparger, and temperature ...
M. J. Bly, R. M. Worden
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Holdup of the liquid slug in two phase intermittent flow
International Journal of Multiphase Flow, 1985Abstract A physical model for the prediction of gas holdup in liquid slugs in horizontal and vertical two phase pipe slug flow is presented. This model can also be used to yield the transition between elonganted bubbles and slug flow within the intermittent flow pattern.
Dvora Barnea, Neima Brauner
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