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- W81535518 abstract "A study of the flow properties of highly loaded suspensions has been in progress at the Pittsburgh Energy Technology Center (PETC) since mid-1981. Preliminary results of this test program were reported at the Fourth Symposium. This paper presents results from the continuation of this effort; the research to date has focused on coal-water mixtures prepared at PETC without the use of special particle size distributions. The program is conducted using a flow loop facility and a supporting laboratory. The results of the tests to date indicate that the coarser suspensions behave as shear-thinning fluids and exhibit lower pressure losses through the range of concentrations tested. For the coarse material, the range of concentrations and velocities studied includes regions of homogeneous and nonhomogeneous flow. For all particle size distributions studied, the data for the steady, homogeneous flow conditions can be fit with simple models for the laminar flow of time-independent fluids. For nonsteady flows (e.g., elbows), some evidence of secondary flows exists at low concentrations. Furthermore, the measured differences between vertical-to-horizontal and horizontal-to-vertical transitions require additional study. The nonhomogeneous flow conditions are not amenable to a simple modeling approach. More complex expressions that adequately include the effect of the high solidsmore » concentrations on settling velocities will be utilized. 9 figures.« less" @default.
- W81535518 created "2016-06-24" @default.
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- W81535518 date "1983-01-01" @default.
- W81535518 modified "2023-09-24" @default.
- W81535518 title "Flow properties of coal-water mixtures" @default.
- W81535518 hasPublicationYear "1983" @default.
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