BackfillTek
Mining
- May 17, 2005
- 5
Hello,
I am currently studying the relationship of shear stress vs. shear rate using a co-axial cylinder viscometer (DIN 53019) and comparing the results to our lab pipeline viscometer. The material being tested is very fine grained tailings, approx 50% passing 20um. The consistency is considered to be non-segregating slurry, between slurry and paste consistency.
I am using the 8V/D method for pipeline shear rate, corrected using the 'n' factor determined from ln(tau)/ln(8V/D). The flow curves obtained generally follow the same trendline, but the viscometer values are less than the pipeline values. The viscometer data has been corrected for (wall slip & end effect.)
Is there a direct relationship between pipeline shear rates and viscometer shear rates? What is the recommended approach to approximate pipeline pressure losses using a co-axial cylinder viscometer?
Any help would be appreciated!
I am currently studying the relationship of shear stress vs. shear rate using a co-axial cylinder viscometer (DIN 53019) and comparing the results to our lab pipeline viscometer. The material being tested is very fine grained tailings, approx 50% passing 20um. The consistency is considered to be non-segregating slurry, between slurry and paste consistency.
I am using the 8V/D method for pipeline shear rate, corrected using the 'n' factor determined from ln(tau)/ln(8V/D). The flow curves obtained generally follow the same trendline, but the viscometer values are less than the pipeline values. The viscometer data has been corrected for (wall slip & end effect.)
Is there a direct relationship between pipeline shear rates and viscometer shear rates? What is the recommended approach to approximate pipeline pressure losses using a co-axial cylinder viscometer?
Any help would be appreciated!
