2.4 Test matrix

Table 1 provides the test matrix for examining the effect of liquid properties as well as gas superficial velocity (USG=4QG/πD2 ) on multiphase parameters (e.g. bubble size and void fraction). To explore the effect of liquid properties on bubble size and void fraction, aqueous solutions of glycerin with different concentrations were tested. In the current work, the range of the liquid viscosity tested was in excess of two orders of magnitude, while the surface tension and density were changed by only about 10% and 20%, respectively, relative to that of water.
Table 1 . Test matrix for liquid phase properties (at 20 °C) and gas superficial velocities.