Prediction of pressure drop of two-phase coal slurries in pipelines
Pressure drop and flow rate measurements through pipeline viscometers were analyzed using the power law, Bingham-plastic, and Bowen non-Newtonian rheological models in a computer program. Wall slip was corrected with Hanks' modification of the Rabinowitsch-Mooney equation. The possibility of solids settling was analyzed with the Oroskar-Turian correlation. The program relates shear stress to shear rate for Fort Lewis coal-slurry data to within 5% for flow without solids settling. Wilsonville coal-slurry data with solids settling were fit to within 17% by the Bowen model, but the Bowen parameters are very sensitive to operating conditions. Pressure drop is predicted in the program as a function of flow rate and pipe diameter, using the analysis of best-fit rheological parameters and literature correlations for friction factors. The effect of wall slip on shear stress decreased with increasing pipe diameter. A modification to the graphical criterion for turbulence was proposed that utilizes the numerical value of the slopes of the branched flow curves.
- Research Organization:
- Massachusetts Inst. of Tech., Oak Ridge, TN (USA). School of Chemical Engineering Practice
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6697783
- Report Number(s):
- ORNL/MIT-349; ON: DE83003382
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
CARBONACEOUS MATERIALS
COAL
CORRELATIONS
DATA
DATA ANALYSIS
DISPERSIONS
ENERGY SOURCES
EXPERIMENTAL DATA
FLUID FLOW
FOSSIL FUELS
FREIGHT PIPELINES
FRICTION FACTOR
FUELS
GAS FLOW
INFORMATION
LAMINAR FLOW
MATERIALS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MIXTURES
NUMERICAL DATA
PIPELINES
PRESSURE DROP
RHEOLOGY
SLIP FLOW
SLURRIES
SLURRY PIPELINES
SUSPENSIONS
TURBULENCE
TURBULENT FLOW
TWO-PHASE FLOW
VISCOSIMETERS