Transient Behavior of Bingham Fluid in Concentric Cylinder Viscometer
Date Issued
2016
Date
2016
Author(s)
Li, Pin-Ching
Abstract
To predict mud flow rheological property, the rheological parameters of a Bingham fluid are verified with empirical data in this paper. In our experiment, kaolinite suspension is chosen to be the experimental material. The design of the experiment serves the assumption and boundary conditions of the analytical solutions developed in both steady and unsteady state. Moreover, we quantify the end effect in experiment way, and we derive the verification formulas of rheological parameters with analytical solutions. After verifying the data from our rheological experiment, two different groups of rheological parameters can be obtained. One of them is obtained with the equilibrium data calculated by the steady verification formula and so-called the steady state rheological parameters. In the contrast, the other group is verified with transient data by the unsteady verification formula, and the parameters in this group are time-dependent, yet still being steady state rheological parameter. Subsequently, we discuss the discrepancies of the equilibrium time of the rheological parameters verified in different verification formula. The rheological parameters verified with transient data by unsteady verification formula can convergent with the steady state parameters faster, when the concentration of the kaolinite suspension is higher.
Subjects
Coussot viscometer
mud suspension
kaolin clay
unsteady property
Type
thesis
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