Cone-and-plate viscometry: explicit formulae for shear stress and shear rate and the determination of inelastic thixotropic properties
1966; IOP Publishing; Volume: 17; Issue: 2 Linguagem: Inglês
10.1088/0508-3443/17/2/313
ISSN2057-7656
Autores Tópico(s)Drilling and Well Engineering
ResumoExplicit formulae are given enabling shear stress-shear rate relations for time-independent non-Newtonian fluids and the equations of state of inelastic thixotropic fluids to be determined from experimental speed-torque curves. An equation is given which allows the rate equations of the thixotropic fluids to be determined in the presence of non-uniform shear rate and structure in the sample. It is shown that in certain circumstances it is justifiable to neglect the variations in shear rate and structure for the largest cone angle of 4° in common use.
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