Semifluid
Semifluid is a descriptive term used for substances whose flow behavior lies between that of a liquid and a solid. Semifluid materials can flow under applied stresses but often possess a finite yield stress and a structured microstructure that resists rapid deformation. In rheology, such materials are typically non-Newtonian and display viscoelasticity, time-dependent behavior, and viscosity that depends on shear rate or history.
Rheological models commonly used for semifluids include Bingham plastics and Herschel-Bulkley types, which combine a yield
Common real-world examples include toothpaste, mayonnaise and ketchup, various gels and pastes, clay suspensions, and some
Characterization relies on rheometry, slump tests, or other flow tests to measure yield stress, viscosity, and