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An Absolute Falling Tube Viscometer by Fulin Gui; Thomas F. Irvine Jr. is a Engineering article available to read on EtoBox.
What is An Absolute Falling Tube Viscometer about?
m A structurally simple absolute viscometer, the falling tube viscometer, with a large measurement range for viscosity from 0.5 to 10 9 cP (5 × 10 -4 to 10 6 N s/m2), has been extensively investigated. The flow field, shear rate, and pressure distribution in the viscometer have been obtained numerically to determine the entrance and exit effects. The viscometer was characterized by two variables, the geometry number Ge and the end correction factor. The former is exclusively determined by the dimensionless tube diameters and length and reflects the ratio of tube driving force to resistance. The latter is defined as the ratio of the actual to ideal geometry numbers. The results presented allow the prediction of end effects and geometry number without resorting to empirical corrections or instrument calibration. The agreement between the analytical and experimental results on the geometry number, the measured viscosity of standard fluids, repeatability, and accuracy is well within 1% in all cases. A correlation equation from which the geometry number can be calculated is presented that can be used to design viscometers for particular applications. Both the theoretical analysis and th
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- Author
- Fulin Gui; Thomas F. Irvine Jr.
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0894-1777)
- Published
- 1996
- Language
- EN
- Field
- Engineering (Physical Sciences)