Applied Rheology | |
Measurement Errors in Yield Stress Rheometry that Arise from Torque Auto Zero | |
Scales Peter J.1  Fisher Daniel T.1  Boger David V.1  | |
[1] Particulate Fluids Processing Centre, Department of Chemical and Biomolecular Engineering, University of Melbourne, Victoria, 3010, Australia; | |
关键词: yield stress; suspension rheology; vane rheology; concentrated suspensions; particles; | |
DOI : 10.1515/arh-2006-0015 | |
来源: DOAJ |
【 摘 要 】
The measurement of the shear rheology of concentrated particulate suspensions is important to a range of mixing, pumping and flow operations. The use of a four or six bladed vane attached to a rheometer in an open cup is a popular technique to achieve a rheological characterisation. A problem occurs in the use of automated software with a number of rheological devices for yield stress materials. A torque auto zero default causes the torque at the start of a test to be ignored, and can result in significant errors and underestimation of the yield stress or rheological response of the suspension. The potential effect of using a torque auto zero default is demonstrated for a concentrated particulate suspension of nickel laterite.
【 授权许可】
Unknown