Centrifugal scaling of isothermal gasliquid flows in horizontal tubes
Abstract
To test the similarity criteria of twophase gasliquid flows, arising from the governing equations and boundary conditions, the flow of air and a waterglycerine mixture in a 50 mm diameter horizontal tube is compared with a twophase flow of helium and water in a 5 mm diameter tube rotating around a parallel vertical axis (the effective gravity is 113 g0). Results emphasize that in general only dimensionless correlations provide meaningful predictions. The homogeneous Dukler case 1 (1964b) correlation, which contains no twophase information, provides the best fit (the standard deviation is 21%) with the measured pressure drops. For predicting flow pattern the most promising approach is that of Taitel and Dukler (1976). Examples of scaling down large diameter, high pressure pipelines are presented. With a scale factor of 1/30 equality of the Froude number, the gasliquid density ratio, and either the Reynolds number or the Weber number can be realized. Compressibility and gas viscosity are not properly scaled.
 Publication:

Ph.D. Thesis
 Pub Date:
 May 1986
 Bibcode:
 1986PhDT.........8G
 Keywords:

 Centrifuging;
 Gas Flow;
 Liquid Flow;
 Pipe Flow;
 Scale Effect;
 Two Phase Flow;
 Flow Distribution;
 Flow Measurement;
 Froude Number;
 Gravitational Effects;
 Reynolds Number;
 Void Ratio;
 Fluid Mechanics and Heat Transfer