Question
Download Solution PDFWhat is the SI unit for dynamic viscosity?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Viscosity: The property that represents the internal resistance of a fluid to motion (i.e. fluidity) is called viscosity. There are two types of viscosity:
Dynamic viscosity: It is the property of a fluid which offers resistance to the movement of one layer of fluid over an adjacent layer of the fluid.
- Its SI unit is N-s/m2 or Pa-s.
- Its C.G.S unit is Poise.
- 1 Poise = 0.1 Pa-s = 0.1 Ns/m2
Kinematic Viscosity: The ratio of dynamic viscosity to density appears frequently and this ratio is given by the name kinematic viscosity.
\({\rm{Kinematic\;Viscosity\;}}\left( {\rm{\gamma }} \right) = {\rm{\;}}\frac{{{\rm{Dynamic\;viscosity\;}}\left( {\rm{\mu }} \right)}}{{{\rm{density\;}}\left( {\rm{\rho }} \right)}}\)
- Its SI unit = m2/s.
- Its C.G.S unit = Stoke or cm2/s.
- 1 Stoke = 10-4 m2/s.
Last updated on May 28, 2025
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