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The property of a fluid to resist the growth of shear deformation is called viscosity. The form of the relation between shear stress and rate of strain depends on a fluid, and most common fluids obey Newton’s law of viscosity, which states that the shear stress is proportional to the strain rate: dγ τ = μ. . dt.
3.1 DEFINITION AND MEASUREMENT OF VISCOSITY The behavior of a fluid in flow is very much related to two intrinsic properties of the fluid: density and viscosity. For example, a solid body moving through a gas has to overcome a certain resistance which depends on the relative velocity between fluid and solid, the shape of the solid, the
1. INTRODUCTION. 1.1 GENERAL INFORMATION. 1.2 VISCOSITY UNITS AND CONVERSION. 1.3 FLUID FLOW AND VISCOSITY. 2. VISCOMETERS. 2.1 CAPILLARY VISCOMETERS. 2.1.1 THEORY. 2.1.1.1 Kinetic Energy Correction. 2.1.1.2 End Corrections.
1.8.1 Viscosity of Newtonian Fluids Definitions • viscosity (dynamic viscosity, absolute viscosity): a fluid’s resistance to deformation from shear stress
DEFINITION: Viscosity can be defined as the property of any fluid that determines its resistance to motion, against a containing surface or against adjacent increments of itself.
Viscosity. The fluids that we have described in the previous lectures are ideal in the sense that there are no dissipative losses (or friction) in their motion. But we know that the boundary of a fluid and a wall must be rough, and exert drag on a flowing fluid just like friction does between solid surfaces pushed into contact by a force.
1 sty 2014 · Viscosity is the resistance of fluids to motion. The dynamic viscosity at a point of a homogeneous fluid, μ, is defined as the ratio of the local shear stress, τ, and the local velocity gradient, also called the rate of shear, γ. The kinematic viscosity of a fluid, ν, is equal to the ratio μ / ρf.
