A contribution to the numerical description of rotating two-phase 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 resistivity-probe technique at void fractions of 0.25-0.75 and superficial liquid velocities of 1.3-2.1 m/sec. The data were correlated using power-law distribution functions, and Sauter mean diameters calculated from the bubble-size spectra are found to agree with the predictions of an energy-dissipation 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 turbulence-viscosity 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 two-fluid models of two-phase 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;
- Gas-Liquid Interactions;
- Mathematical Models;
- Signal Processing;
- Test Facilities;
- Transducers;
- Turbulent Flow;
- Viscous Flow;
- Fluid Mechanics and Heat Transfer