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Viscosity is a measure of a fluid’s resistance to flow. The SI unit of viscosity is poiseiulle (PI). Its other units are newton-second per square metre (N s m -2) or pascal-second (Pa s.) The dimensional formula of viscosity is [ML -1 T -1].
1 sty 2018 · Viscosity is the resistance to gradual deformation of a medium under shear stress. The viscosity can be independent (“Newtonian” or “ideal-viscous” media) or dependent (“Non-Newtonian” media) on...
17 wrz 2024 · Viscosity is the resistance of a fluid (liquid or gas) to a change in shape or movement of neighbouring portions relative to one another. Viscosity denotes opposition to flow. What is the reciprocal property of viscosity?
Informally, viscosity is the quantity that describes a fluid's resistance to flow. Formally, viscosity is the ratio of shearing stress to velocity gradient.
5 dni temu · Viscosity is a physical quantity that describes a fluid’s resistance to flow. It is a property that resists the relative displacement of the different layers of the fluid. It can be considered as the fluid friction occurring inside the fluid due to the internal friction between the molecules.
Viscosity is the force of friction which one part of the liquid offers to another part of the liquid. The force of friction f between two layers each having area A sq cm, separated by a distance dx cm, and having a velocity difference of dv cm/sec, is given by: f ∝ A ( dv / dx ) f = η A ( dv/dx)
The internal friction that causes this velocity gradient is called the viscosity of the fluid. For sufficiently small velocities the flow will be laminar i.e. layered. One can show that laminar flow leads to a parabolic distribution of velocities across a pipe with a circular cylindrical cross section.
