Abstract

AbstractRheological properties – Explanation, measurement, determination, and significance. The non‐Newtonian viscous (structurally viscous, dilatant, plastic, thioxotropic, rheopexic) and elastic properties of liquids are explained with the aid of examples and the main methods of measurement are described. In the case of elastic behaviour, particular attention is given to similarity of measurements obtained by different methods (normal stress measurements, relaxation experiments, vibrational measurements). The second part of the paper is concerned with analytical determination of rheological properties via special material functions, their dimensionless formulation, and their consideration in the dimensional analysis of physical processes. The significance of non‐Newtonian properties in the description of physical processes is demonstrated by an example.

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