Viscosity Measurement Technique Using Standard Glass Burette for Newtonian Liquids

2005 ◽  
Vol 33 (1) ◽  
pp. 101-125 ◽  
Author(s):  
C. Igathinathane ◽  
V. K. Malleswar ◽  
U. Appa Rao ◽  
L. O. Pordesimo ◽  
A. R. Womac
Keyword(s):  
Measurement Technique ◽  
Viscosity Measurement ◽  
Standard Glass ◽  
Newtonian Liquids

Viscosity (Part 1)

1981 ◽  
Vol 14 (3) ◽  
pp. 73-78 ◽  
Author(s):  
D. C-H. Cheng
Keyword(s):  
Apparent Viscosity ◽  
Absolute Measurement ◽  
Viscosity Measurement ◽  
Newtonian Fluids ◽  
Current Work ◽  
Practical Implementation ◽  
Newtonian Viscosity ◽  
Know How ◽  
The Subject ◽  
Newtonian Liquids

This article reviews the standard specifications related to viscosity measurement, issued by ASTM, BSI, IP and other standard bodies, and their applications. The know-how embodied in these specifications is discussed in relation to knowledge recorded in the literature and some aspects of practical implementation and use are considered. It is shown that standards and calibration are well established for Newtonian liquids and viscosity measurement can be accurate and precise. But, for non-Newtonian fluids, the specifications give apparent viscosity, not absolute values; and even then the results, although they can be precise, are of uncertain accuracy. It is pointed out that information exists in the literature on the subject of absolute measurement of non-Newtonian viscosity but that it needs to be simplified and codified before it can be incorporated into standard specifications. Current work towards this end is referred to.

An Electromechanical In Situ Viscosity Measurement Technique for Shear Thickening Fluids

2021 ◽  
Vol 43 ◽  
pp. 33-43
Author(s):  
Gökhan Haydarlar ◽  
Mehmet Alper Sofuoğlu ◽  
Selim Gürgen ◽  
Melih Cemal Kushan ◽  
Mesut Tekkalmaz
Keyword(s):  
Measurement Technique ◽  
Low Cost ◽  
Spectral Response ◽  
Shear Thickening ◽  
Viscosity Measurement ◽  
Rheological Parameters ◽  
Shear Thickening Fluid ◽  
Electromechanical Impedance ◽  
Shear Thickening Fluids

This paper presents the feasibility of developing an electromechanical in-situ viscosity measurement technique by analyzing the detectability of small variations in the viscosity of different shear thickening fluids and their different compositions. Shear thickening fluid (STF) is a kind of non-Newtonian fluid showing an increasing viscosity profile under loading. STF is utilized in several applications to take advantage of its tunable rheology. However, process control in different STF applications requires rheological measurements, which cause a costly investment and long-lasting labor. Therefore, one of the most commonly used in-situ structural health monitoring techniques, electromechanical impedance (EMI), was used in this study. In order to actuate the medium electromechanically, a piezoelectric wafer active sensor (PWAS) was used. The variations in the spectral response of PWAS resonator that can be submerged into shear thickening fluid are analyzed by the root mean square deviation, mean absolute percentage deviation and correlation coefficient deviation. According to the results, EMI metrics provide good correlations with the rheological parameters of STF and thereby enabling quick and low-cost rheological control for STF applications such as vibration dampers or stiffness control systems.

Viscometric Studies of Rubber Solutions

1935 ◽  
Vol 8 (2) ◽  
pp. 259-265 ◽  
Author(s):  
Markus Reiner
Keyword(s):  
Inflection Point ◽  
Rotational Diffusion ◽  
Viscosity Measurement ◽  
Stress Axis ◽  
Convex Part ◽  
Cent Concentration ◽  
Straight Line ◽  
Newtonian Liquids ◽  
Consistency Curve ◽  
Newtonian Behavior

Abstract A former communication reported viscometric observations on rubber-toluene solutions in different capillary and rotation viscometers. The consistency curve of solutions from 0.08 to 1.77 per cent concentration starts at the origin as a straight line, inclined at a definite angle until it reaches a certain point a (see Fig. 1). From there it becomes convex toward the stress axis. This convex part extends to an inflection point b where the curve becomes concave up to a point c, where it again becomes a straight line which by extrapolation passes through the origin. The solutions therefore behave as Newtonian liquids between points o and a, and c and ∞. Between point a and c they are non-Newtonian liquids. It was furthermore shown that the “relative” consistency curve, i. e., a curve in which the shearing stress is reduced or the rate of shear increased in proportion to the viscosity of the solvent, is independent of the temperature at which the viscosity measurement is made. From this latter property the conclusion was drawn that the phenomenon of non-Newtonian behavior is a purely mechanical one. It cannot be due, as has been suggested by Staudinger, to a competition between orientation due to laminar flow and rotational diffusion due to Brownian movement because the magnitude of the latter depends on the temperature.

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