Two-Phase Frictional Pressure
Drop in Flooded-Bed Reactors:
A
State of the art correlation
Chem.
Eng. Technol. 21 (1998) 887-893
F. Larachi, Z. Bensetiti, B.P.A. Grandjean
Department of Chemical Engineering Laval University
Sainte-Foy Québec G1K 7P4 CANADA
G.Wild
Laboratoire des Sciences du génie chimique de Nancy
1 rue Granville BP 451, Nancy 54001 FRANCE
Abstract
A state-of-the-art correlation for the prediction of frictional gas-liquid
pressure drop in cocurrent upflow fixed bed reactors was derived based on a
wide hydrodynamic data bank of flooded packed-bed reactors. The data bank,
which contains more than 3,400 measurements, was constructed using information
collected from 22 sources over the past 40 years. The correlation, which relied
upon combination of dimensional analysis and artificial feedforward neural
networks, was expressed as a two-phase friction factor function of the five
most pertinent dimensionless groups (ReLG, Mo, St, FrL, XL).
The prediction and generalization capabilities of the proposed correlation and
the limits of existing literature correlations and models were demonstrated by
systematic statisitical tests over the constructed data bank.
You can get the flb2pd.zip file to compute the frictional factor f LG . The file contains the Fortran
source code along with the model parameter file.
You may download also an Excel worksheet simulator