Concept information
Preferred term
viscosity
Definition(s)
- The viscosity of a fluid is a measure of its resistance to deformation at a given rate. For liquids, it corresponds to the informal concept of "thickness": for example, syrup has a higher viscosity than water. Viscosity quantifies the internal frictional force between adjacent layers of fluid that are in relative motion. For instance, when a viscous fluid is forced through a tube, it flows more quickly near the tube's axis than near its walls. Experiments show that some stress (such as a pressure difference between the two ends of the tube) is needed to sustain the flow. This is because a force is required to overcome the friction between the layers of the fluid which are in relative motion. For a tube with a constant rate of flow, the strength of the compensating force is proportional to the fluid's viscosity. (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Viscosity)
Broader concept(s)
Narrower concept(s)
Synonym(s)
- dynamic viscosity
In other languages
-
French
-
viscosité dynamique
URI
http://data.loterre.fr/ark:/67375/MDL-QHQ9DGGW-D
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