Browsing by Subject "Hydraulic conveying"
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Item Flow of fine particle suspensions in bends, fittings and valves(Texas Tech University, 1981-12) Hsu, Feng-lungThe results of extensive experimental studies to determine the head losses for flow of fine-particle suspensions in bends, fittings, valves and pipes are presented in this thesis. Methods of determining losses in fine-particle suspensions flowing through pipes and fittings are discussed, as well as methods of expressing these losses in a form useful for design purposes. Glass beads with dsO=12.5µ and with d5O=44.5µ were used in this work. This work was restricted to the transport of fine particles and the particle volume concentration of suspensions up to 32.5% were studied. Furthermore, in this work, only the practical important case of transport at fluid velocities above the saltation velocity has been considered. For homogeneous flow conditions, effects of particle size and concentration are negligible and the loss coefficients for carrier fluid can be used for fine-particle suspensions. Hence, practical prediction of pressure drop in pipelines can be carried out.Item Flow of Fine Particle Suspensions in Horizontal Pipelines(Texas Tech University, 1981-12) Ma, Tzu-wang WarrenA pressure drop correlation for the flow of fine particle suspensions (d < 75M) in horizontal pipelines was developed. A total number of 57I data points, comprised of 138 collected from the published literature together with 433 taken using our own test pipelines were used as the basis for this correlation. The correlation provides superior predictive capability for both uniformly and nonuniformly sized fine particle suspensions. Data for the deposit velocity of uniformly sized fine particle suspensions were determined from the minima in the pressure drop-velocity curves of our flow experiments. These data, which totalled 12 points were used to develop a deposit velocity correlation for uniformly sized fine particle suspensions. Deposit velocities from the SRC data on suspensions with broad particle size distributions consisted of 24 data points. These data were also used to develop a deposit velocity correlation for nonuniformly sized fine particle suspensions. Both correlations pertain to high solids concentrations (C > 10?J by volume) and provide an improved predictive capability over previously published correlations.