Begell House Inc.
Multiphase Science and Technology
MST
0276-1459
2
1-4
1986
FLOW PATTERN TRANSITIONS IN GAS-LIQUID SYSTEMS: MEASUREMENT AND MODELING
1-94
10.1615/MultScienTechn.v2.i1-4.10
A. E.
Dukler
University of Houston, Chemical Engineering Department, Houston, Texas, 77204, USA
Yehuda
Taitel
School of Mechanical Engineering, Faculty of Engineering, Tel-Aviv University, Ramat-Aviv 69978, Israel
This paper gives a comprehensive interpretation on the flow patterns occurring in gas-liquid horizontal, inclined and vertical pipeline flows and investigates various effects on their transitions. The postulated theoretical models for prediction of flow pattern transitions in systems without mass transfer are presented in detail. For horizontal pipe flows with boiling and condensation, a modified mechanistic theory is suggested; the predicted transitions are in good agreement with the experimental data. Finally, the approaches developed by Venkateswarar et al. (1982) to modelling the flow pattern transition for two-phase flows of steam and water in vertical rod bundles are presented.
A CRITICAL REVIEW OF THE FLOODING LITERATURE
95-180
10.1615/MultScienTechn.v2.i1-4.20
Sang Chun
Lee
Department of Chemical Engineering, Northwestern University, Evanston, Illinois 60201
S. George
Bankoff
Department of Chemical Engineering, Northwestern University, Evanston, Illinois 60201, USA
This paper presents an extensive review of the process of flooding and its associated phenomena in countercurrent pipe flow. Analytical models developed previously for condensing two-phase flow as well as for adiabatic two-phase flow are reviewed and compared with experimental data. A classification of these models is suggested in terms of stability theory of a travelling wave, envelope theory, static equilibrium theory and slug formation theory. The ranges of validity of the models are examined and discussed for various flow conditions. The available evidence on the parametric dependence of the flooding curve is also discussed.
A COMPREHENSIVE EXAMINATION OF HEAT TRANSFER CORRELATIONS SUITABLE FOR REACTOR SAFETY ANALYSIS
181-274
10.1615/MultScienTechn.v2.i1-4.30
C. W.
Snoek
Atomic Energy of Canada Ltd., Chalk River Nuclear Laboratories, Chalk River, Ontario, Canada
D. C.
Groeneveld
Atomic Energy of Canada Limited, Chalk River Laboratories, Chalk River, Ontario, Canada K0J 1J0; Department of Mechanical Engineering, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
This paper gives a detailed examination of the heat transfer correlations used in reactor safety analysis. It is found that empirical heat transfer correlations can be used with reasonable confidence for most flow regimes and boiling modes. Furthermore, several new empirical correlations for prediction covering a wide range of regimes are suggested.
REBOILERS
275-331
10.1615/MultScienTechn.v2.i1-4.40
P. B.
Whalley
Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, England
Geoffrey F.
Hewitt
Department of Chemical Engineering & Chemical Technology, Imperial College of Science, Technology & Medicine, Prince Consort Road, London SW7 2B Y, England, UK
This contribution describes the main types of reboilers used in the process industry and suggests some rules by which the type of reboiler for a particular duty can be selected. Also, a survey of the main design problems encountered with reboilers is discussed, that is, two-phase pressure drop, boiling heat transfer, critical heat flux and instability.
FLOW OF GAS-SOLID MIXTURES THROUGH STANDPIPES AND VALVES
333-426
10.1615/MultScienTechn.v2.i1-4.50
L. S.
Leung
Department of Chemical Engineering, University of Queensland, St. Lucia 4067, Australia
P. J.
Jones
Shell Refining (Aust.) Pty. Ltd., Geelong Refinery, Geelong, Australia
This paper summarizes the classifications of flow regimes, demarcations between flow regimes and equations describing each flow regime for fluidized and nonfluidized gas-solid flow in a standpipe. Effects of gas compression and aeration on behaviour of mixture flow (e.g. void profile and pressure drop) are studied. Additionally, two governing equations are suggested to simulate the flow of gas-solid mixtures through an orifice or a valve, which show good agreements with experimental data.
CORE-ANNULAR FLOW OF OIL AND WATER
427-476
10.1615/MultScienTechn.v2.i1-4.60
R. V. A.
Oliemans
Koninklijke/Shell Laboratorium, Amsterdam (Shell Research B.V.), The Netherlands
Gijsbert
Ooms
Koninklijke/Shell-Laboratorium, Amsterdam (Shell Research B.V.), Delft University of Technology, Delft, the Netherlands
This paper reviews the existing theoretical models and correlation methods in modelling core-annular flow of oil and water in a pipe line. By taking into account the effect of eccentricity, a lubricating-film model is developed to predict the pressure reduction. The model is further investigated by comparing with the experiments carried out with high viscosity oil in a wide range of pipe diameters (1 to 8 inch).