![]() Basic knowledge of these subjects is essential in process design and product quality evaluation.Īnother way of defining materials rheologically is by the terms viscous, elastic or viscoelastic. In practice, therefore, rheology stands for viscosity measurements, characterisation of flow behaviour and determination of material structure. Rheologically, the consistency is described by two components, the viscosity (thickness, lack of slipperiness) and the elasticity ('stickiness', structure). Rheology is used in food science to define the consistency of different products. Bingham, was the founder of the science of rheology in the mid-1920s. Professor Reiner, together with Professor E. ![]() It was also described by the Greek philosopher Heraclitus as “panta rei” – everything flows. Reiner, this expression means everything flows if you just wait long enough, a statement that is certainly applicable to rheology. In the book of Judges in the Old Testament, the prophetess Deborah declared “The mountains flowed before the Lord.” Translated into rheological terms by Professor M. The science of rheology is young, but its history is very old. Rheology is applicable to all types of materials, from gases to solids.Ī main issue is also the measurement, adaptation and application of viscosity data, which concerns the design calculations of processing equipment. The term itself originates from Greek rheos meaning 'to flow'. Rheology is defined as the science of deformation and flow of matter.
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