A contribution to the numerical description of rotating twophase flow
Abstract
Experimental and numerical investigations of atmospheric rotating and nonrotating air/water flows are reported. Local values of void fraction and bubble velocity and diameter were measured using a resistivityprobe technique at void fractions of 0.250.75 and superficial liquid velocities of 1.32.1 m/sec. The data were correlated using powerlaw distribution functions, and Sauter mean diameters calculated from the bubblesize spectra are found to agree with the predictions of an energydissipation model. A set of eight partial differential equations describing the flow is derived and solved for a 1D flow by a sequential method; a 2D turbulenceviscosity expression is developed; and a possible remedy for a physical problem (related to the solution of the radial liquid momentum equation) in the computation of the 2D solution is proposed. Linear dispersion analysis of instabilities arising in twofluid models of twophase flow suggests that the drag force may have a damping effect on these instabilities. The results are illustrated with numerous graphs and tables.
 Publication:

Ph.D. Thesis
 Pub Date:
 1983
 Bibcode:
 1983PhDT.........9V
 Keywords:

 Computational Fluid Dynamics;
 Flow Measurement;
 Numerical Flow Visualization;
 Rotating Fluids;
 Two Phase Flow;
 Vortices;
 Axisymmetric Flow;
 GasLiquid Interactions;
 Mathematical Models;
 Signal Processing;
 Test Facilities;
 Transducers;
 Turbulent Flow;
 Viscous Flow;
 Fluid Mechanics and Heat Transfer