Results 161 to 170 of about 785 (214)
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Holdup in Vertical Three Phase Flow
Developments in Chemical Engineering and Mineral Processing, 1999AbstractVertical three phase air‐water‐oil data in a. 0.026 m i.d. pipe were presented. The liquid holdup data presented as a complex pattern against f0 the oil liquid volumetric ratio for annular flow at one value of total superficial liquid velocity.
G. S. Woods +3 more
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Phase holdup characteristics of three phase fluidized beds
The Canadian Journal of Chemical Engineering, 1975AbstractThe individual phase holdups in two (liquid‐air, liquid‐solids) and three (liquid‐air‐solids) phase fluidized beds have been measured over a wide range of liquid and gas velocities. Ex‐periments were canied out in a large two‐dimensional bed. Three solids were used ranging in size from 1 to 6 mm.The effect of viscosity (1‐70 cp) was determined ...
Kim, Sang Done +2 more
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GAS-PHASE HOLDUP IN A SLURRY-BUBBLE COLUMN
Chemical Engineering Communications, 1997Abstract Total and sectional gas-phase holdups are measured in a wide (0.305 m internal diameter) and long (3.7 m) glass bubble column al ambient conditions as a function of superficial gas velocity. Sectional gas holdup values vary along the length of the column and decrease as the height above the gas distributor plate increases in the transitional ...
J. W. ZHU, V. H. TRIVEDI, S. C. SAXENA
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Holdup characteristics of two-phase parallel microflows
Microfluidics and Nanofluidics, 2013Two-phase parallel microflows, i.e., stratified flow and core-annular flow, have many applications in lab-on-chip devices. These include transport and reaction processes, such as liquid–liquid extraction and phase transfer catalysis. The phase holdup (fraction of the microchannel volume occupied by a specified phase) is a key parameter of these flow ...
Anil B. Vir +4 more
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Mass Transfer and Phase Holdup Characteristics in Three-Phase Fluidized Beds
Chemical Engineering Communications, 1993The effects of liquid surface tension (42.6 ∼ 72,4 mN/m) and viscosity (1 ∼214mPa • sn), liquid (0.01 ∼0.12m/s) and gas (0.01 ∼0.20m/s) velocities and particle sizes (1 — 8 mm) on phase holdup and mass transfer coefficient ( kLa) have been determined in a 0.142 m-I.D. × 2.0 m-high Plexiglas column.
Jong-Oh Kim, Sang Done Kim
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PREDICTION OF GAS-PHASE HOLDUP IN A BUBBLE COLUMN
Chemical Engineering Communications, 1997Hydrodynamic properties of bubble columns play a significant role in many chemical and biochemical processes. Recent theoretical and experimental work conducted by Krishna et al. (1991, 1994), and Wilkinson et al. (1992) have been examined in conjunction with a bubble column and data for the air-water system operating at ambient conditions.
J. W. ZHU, S. C. SAXENA
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Ultrasonic technique for dispersed-phase holdup measurements
Industrial & Engineering Chemistry Research, 1987Mesure du temps de transit d'un train de pulsations ultrasonores, dans une colonne d'extraction liquide-liquide. Un modele de moyenne temporelle permet d'evaluer la retenue de la phase dispersee a partir du temps de transmission global des pulsations sonores.
J. C. Bonnet, L. L. Tavlarides
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Phase Holdups and Liquid-Liquid Extraction in Three Phase Fluidized Beds
Chemical Engineering Communications, 1988Abstract Effects of the continuous phase velocity (0.01-0.08 m/s(, the dispersed phase velocity (0.0-0.04 m/s) and particle size (1.0-3.0 mm) on the individual phase holdups and the mass transfer coefficient have been determined in two (liquid-liquid) and three (liquid-liquid-solid) phase fluidized beds.
Sang Done Kim
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Distributions of flow regimes and phase holdups in three-phase fluidized beds
Chemical Engineering Science, 1995Abstract Pressure fluctuation characteristics at different axial and radial positions were investigated in a three-phase fluidized-bed Plexiglas column of 285 mm inside diameter and 4100 mm height operated with air, tap water and glass beads under different conditions. It was found that the whole column may display different flow regimes depending on
Zumao Chen +3 more
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Measurement of Local Phase Holdups in a Two- and Three-Phase Bubble Column
Chemical Engineering & Technology, 2000A new invasive sensing probe for the measurement of local phase holdups in two- and three-phase reactors is described. The local gas and solids holdups in a bubble column with a volume of V=2 m 3 at varying operating conditions (gas velocity, sparger design, solids content and density) are measured by means of differential pressure measurement in ...
H. Dziallas, V. Michele, D. C. Hempel
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