![]() This page details why certain liquids flow easily while others are slow as molasses. Liquids whose molecules are polar or can form hydrogen bonds are usually more viscous than similar nonpolar substances. 2.1: What is Viscosity Viscosity is a fluids resistance to flow. In other words a plot of shear stress versus shear strain rate is linear. Note the correlation between the surface tension of a liquid and the strength of the intermolecular forces: the stronger the intermolecular forces, the higher the surface tension. Viscosity is governed by the strength of intermolecular forces and especially by the shapes of the molecules of a liquid. A Newtonian fluid is one in which the viscosity is independent of the shear rate. ABSTRACT The viscosity is a measure of its resistance to deformation of a liquid at a given rate and corresponds to thickness 1 Viscosity can be conceptualized as quantifying the frictional force that arises between adjacent layers of fluid that are in relative motion.
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