Showing papers in "Powder Technology in 1970"

TL;DR: In this article, the frequency, concentration and size of bubbles bursting at the surfaces of two and three-dimensional gas-fluidised beds have been measured and a theoretical model is developed which shows that this is due to the occurrence of out-of-line coalescence and to departure from the strict two-phase theory.

TL;DR: The effect of added air flows on the flow rate and behavior of free-flowing particles issuing from the base of a hopper has been studied experimentally and theoretically as mentioned in this paper.

TL;DR: In this paper, it was shown that the magnitude of surface-to-bed heat transfer coefficients is dependent on the frequency of particle exchange between the bulk of the bed and the vicinity of the heat transfer surface.

TL;DR: In this paper, a particle velocity meter is described for the measurement of local solids velocities, depending on the impact of the particles, individual particle momentums or local mass flow rates can be measured.

TL;DR: In this article, the velocity field of particles adjacent to the wall of the bin has been found by a photographic method and this has been used to calculate the discharge rate of granular agricultural materials from flat-bottomed bins.

TL;DR: Sodium chloride was milled in a ball mill at relative humidities 0.5% and 4% for various periods of time as mentioned in this paper, and the particle size was determined by sieve analysis.

TL;DR: A critical review of the origins, nature, measurement and effects of particle residual stresses is given in this article, where a detailed analysis of the origin, nature and measurement of residual stress is presented.