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Aluf Orell

Associate Professor (Retired with Teaching Position)

Personal Info

Ph.D. 1961, University of Illinois

Research Fields

Modeling gas-liquid and gas-liquid-solid flows
Modelling of Two-Phase Flow
Hydrodynamics of Bubble Columns and Air-Lift Reactors
Hydrodynamics of solid-liquid-gas flow

Research Topics

Two-Phase Flow
Modeling of gas-liquid systems, that exhibit specific flow patterns, for predicting their hydrodynamic characteristics. The analyses are applied to batch bubble columns, external loop air-lift reactors and geothermal wells.
Three-Phase Flow
Hydrodynamics of solid-liquid-gas flow in horizontal pipes. Reduction of pressure drop in solid-liquid flow by introduction of gas.


Orell, A. The effect of gas injection on the hydraulic transport of slurries in horizontal pipes, Chem. Eng. Sci., 62, 6659-6676 (2007).

Orell, A. Experimental validation of a simple model for gas-liquid slug flow in horizontal pipes, Chem. Eng. Sci., 60, 1371-1381 (2005).

Semiat R., Leshinski E. and Orell, A. A Laser grating technique for local velocity measurement of large drops and jets in liquid-liquid systems, Chem. Eng. Sci., 60, 5111-5123 (1996).

Orell, A. On the liquid flow reversal in bubble columns, Chem. Eng. Comun., 115, 145-159 (1992).