Abstract
A new method for the determination of mechanical stresses in two-phase reactors is described. The time-dependent disintegration kinetics of a clay-floc system are measured with a laser scanning microscope. By describing the flocs employing fractal geometry and by transforming the disintegration kinetics according to a multifractal-approach for turbulent flow fields, effective stresses can be calculated for bubble columns in two-phase operation mode by comparison to the mechanical stress in a turbulent single-phase couette flow. Results are given for stresses measured in a bubble column at different operating conditions.
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