ABSTRACT

Brown and Shook (30) have developed an L-shaped probe for measuring local slurry velocities which functions in a transverse potential field applied by small electrodes recessed into the walls of a short length of 50 mm diameter acrylic plastic pipe. Voltage fluctuations produced by changes in resistivity at the probe-mounted sensors, corresponding to changes in slurry concentration, were cross-correlated. Although it could clearly be used to identify settlement, the probe described was stated to be rather fragile and so can only be regarded as a research tool. The possible limitations in the usefulness of localised flow investigations, as expressed by Ercolani (above), would also apply.