EXPERIMENTS ON DENSELY-LOADED NON-NEWTONIAN SLURRIES IN LAMINAR AND TURBULENT PIPE-FLOWS: FINAL REPORT
An experimental description of the flow structure of non-Newtonian slurries in the laminar, transitional, and fully-developed turbulent pipe flow regimes was the primary objective of this research. Experiments were conducted in a large-scale pipe slurry flow facility with an inside diameter of 51 mm (2 inches). Approximately, 550 liters (145 gal) of slurry were necessary in the operation of the loop. Detailed velocity profile measurements by a two-color, two-component laser Doppler anemometer (LDA) were accomplished in a transparent test section with an optically transparent slurry. These velocity measurements were apparently the first ever reported for a non-Newtonian slurry with a yield value. The transparent slurry was formulated for these experiments from silica with a particle size of one to two microns, mineral oil, and Stoddard solvent. From linear regression analysis of concentric-cylinder viscometer data, the slurry exhibited yield-power-law behavior with a yield stress of 100 dynes/sq cm, and an exponent of 0.630 for a solids concentration of 5.65% by weight. Good agreement was attained with rheological data derived from the pressure drop data in the flow loop under laminar flow conditions. The rheological properties of the transparent slurry were similar to many industrial slurries, including coal slurries, which have a yield value.
- Portions of this document are illegible in microfiche products.
Southwest Research Institute6220 Culebra Road, P.O. Drawer 28510
San Antonio, TX United States 78228-0510
- Park, J T
- MANNHEIMER, R J
- Grimley, T A
- Morrow, T B
- Publication Date: 1989-6
- Features: Figures; References;
- Pagination: 37 p.
- TRT Terms: Doppler navigation; Flow; Flow charts; Laminar flow; Lasers; Linear regression analysis; Pipe flow; Pipelines; Rheological properties; Slurry; Transparence; Turbulence; Velocity; Viscous fluids
- Candidate Terms: Turbulent flow
- Old TRIS Terms: Doppler system; Flow diagrams; Newtonian fluid; Slurries
- Subject Areas: Highways; Hydraulics and Hydrology; Pipelines; Terminals and Facilities;
- Accession Number: 00494368
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: DOE/PC/90962-T10
- Files: TRIS
- Created Date: May 31 1990 12:00AM