Hydrodynamic study of free rise of solid particles and gas bubbles in non-Newtonian fluids

The objective of this study was to determine the primary parameters affecting the rise of gas bubbles and tight solid particles in a non-Newtonian pseudoplastic liquid. The results obtained for the rise of light solid particles were used to explain the behavior of rising gas bubbles. The data for rising light solid particles and gas bubbles were also compared to that of free-falling heavy particles. The main parameters studied in this work were the drag coefficient, terminal velocity, and trajectory of rise as a function of the shape and volume of gas bubbles and solid particles and the rheological properties of the non-Newtonian pseudoplastic, liquid. To create the non-Newtonian pseudoplastic fluid characteristics, solutions of carboxymethylcellulose and water with concentrations ranging from 0.02 to 0.8% w/w were used.; The influence of wall effects on the terminal rise velocity of a solid sphere in a square column in a non-Newtonian pseudoplastic fluid was also determined.; The hydrodynamic characteristics of rising solid spheres at high Reynolds numbers in a non-Newtonian pseudoplastic liquid was established in this work as well. (Abstract shortened by UMI.)...