Experiments on densely-loaded non-Newtonian slurries in laminar and turbulent pipe flows: Quarterly technical progress report No. 2. [Silica gel particles suspended in mixtures of: (1) 70. 3% Stoddard solvent and 29. 7% Exxon 150; (2) 55% Stoddard solvent and 45% mineral oil by weight]

Technical Report · Thu Apr 30 04:00:00 EDT 1987

OSTI ID:6867099

Mannheimer, R J; Grimley, T A; Park, J T; Morrow, T B

An experimental evaluation of the structure of non-Newtonian slurries in laminar, transitional, and turbulent flow regimes in pipes is the primary objective of this research. Experiments are being conducted in a large-scale pipe slurry flow facility with an inside pipe diameter of 51 mm. Detailed flow measurements including turbulence quantities such as Reynolds stress will be taken with a two-component laser-Doppler velocimeter in a transparent test section with a transparent model slurry. Two transparent model slurries have been developed with non-Newtonian rheological properties. Silica gel particles with diameters on the order of one micron were suspended in two different hydrocarbon liquid mixtures with viscosities of 1.19 and 6.39 cS. In rheological measurements with a concentric cylinder viscometer, slurries from both liquid mixtures exhibited slip. From a linear regression analysis with a power-law model, slurries with the higher viscosity fluid had yield values of 80 and 30 dyn/cm/sup 2/ for silica gel concentrations of 5.6 and 4.0% by weight, respectively, and the exponents were 0.584 and 0.763. The measured refractive index for the transparent slurries is 1.454 where the difference in refractive index between the fluid and silica gel is estimated to be less than 0.001. Bench scale tests with large diameter silica gel particles on the order of 100 ..mu..m have produced slurries with excessive turbidity. A silica gel manufactured by a different process which may form a less turbid slurry is currently under investigation. A benchmark pressure-drop experiment was completed in the slurry loop with a glycerine and water mixture. 15 refs., 11 figs., 1 tab.

• Research Organization: Southwest Research Inst., San Antonio, TX (USA)
• DOE Contract Number: FG22-86PC90962
• OSTI ID: 6867099
• Report Number(s): DOE/PC/90962-T2; ON: DE87008934
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
013000 -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
ADSORBENTS
BENCH-SCALE EXPERIMENTS
DATA
DISPERSIONS
EXPERIMENTAL DATA
FLUID FLOW
INFORMATION
LAMINAR FLOW
MIXTURES
NUMERICAL DATA
OPTICAL PROPERTIES
PARTICLE SIZE
PHYSICAL PROPERTIES
PIPES
REFRACTIVITY
RESEARCH PROGRAMS
RHEOLOGY
SHEAR
SILICA GEL
SIZE
SLURRIES
STRESSES
SUSPENSIONS
TEST FACILITIES
TURBULENT FLOW
VELOCITY