Rheology is the scientific discipline that deals with the deformation and flow behavior of matter. The main focus of rheology is on investigating the flow and deformation properties of materials under different stresses, temperatures and time windows or frequencies.
The term "rheology" is derived from the Greek words "rheo" (flow) and "logos" (teaching). In its basic meaning, rheology therefore investigates how materials react to external forces and how their structure changes under different conditions. The results of rheological investigations are particularly important for the processing industry, as they provide insights into the flow and deformation properties of materials during production and thus provide information for the design of process machines and their parameterization.
Rheology provides a variety of physical and engineering parameters, including viscosities, shear and strain rates, elasticities, deformations and deformation rates, as well as mass and volume flow rates. Rheological measurements are usually carried out using special devices known as rheometers, which are used to measure these parameters in a laboratory environment, i.e. with small quantities of material under precisely defined conditions.
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