Begell House Inc.
Multiphase Science and Technology
MST
0276-1459
29
1-4
2017
REVIEW AND SYNTHESIS ON THE SPHERICAL DROPLET IN GASEOUS CARRIER STREAMS
1-181
10.1615/MultScienTechn.v29.i1-4.10
George
Gyarmathy
BBC Brown Boveri & Co., Ltd. Baden, Switzerland
This paper considers the thermodynamic and kinematic behaviour of a droplet in gaseous carrier flow. After reviewing the known (continuum-type and free-molecule type) laws of heat, mass and momentum exchange between two phases, several comprehensive expressions with multi-range validity are synthesized. In addition, a new mathematic model is developed to predict the change rate of droplet size, surface temperature and velocity. The model infers that a close analogy of heat, mass and momentum transfer is maintained at all Knudsen (Kn) numbers at any carrier density and almost any droplet size.
MEASUREMENT AND MODELING OF FLOW PATTERN TRANSITIONS IN GAS-LIQUID SYSTEMS
182-275
10.1615/MultScienTechn.v29.i1-4.20
A. E.
Dukler
University of Houston, Chemical Engineering Department, Houston, Texas, 77204, USA
Yehuda
Taitel
School of Mechanical Engineering, Tel-Aviv University, 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.
MACROSCOPIC PROPERTIES OF SUSPENSIONS IN AN INVISCID FLUID
276-398
10.1615/MultScienTechn.v29.i1-4.30
Graham B.
Wallis
Thayer School of Engineering, Dartmouth College, Hanover, NH 03755
Classical solutions for the motion of a single sphere in an inviscid fluid are reviewed and extensively investigated by self-consistent models. The Maxwell equations for electrical conductivity of a suspension of spheres can be used, as found, to derive the added mass of a sphere array as well as the added kinetic energy due to relative motion. Good agreements are shown between the current analysis and general equations suggested.