In
rheology, the science of
fluids, a
non-Newtonian fluid is one whose
viscosity changes with the applied
shear force.
Types of non-Newtonian fluid include:
- rheopectic (viscosity increases with increasing force, as in some lubricants)
- thixotropic (viscosity decreases with increasing force; e.g. non-drip paints; tomato ketchup)