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Cards In This Set
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The science of flow properties of matter
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Rheology
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The resistance offered when one part of the liquid flows past another
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Viscosity
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The tenacity with which a moving layer of fluid drags adjacent layers of fluid along with it determines its _______
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Viscosity
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Viscosity describes the _________ of a moving fluid.
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Internal friction
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A fluid with high viscosity ________ motion
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Resist its molecular makeup gives it a lot of internal friction.
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T or F A fluid with low viscosity flows easily because its molecular makeup results in very little friction when it is in motion.
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True
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The force required for one layer of a liquid to slip past another layer with a given velocity depends directly on the __________ of the liquid and on the areas of layers exposed to each other
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Viscosity
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The force required for one layer of a liquid to slip past another layer with a given velocity depends inversely on the _______ separating the two surfaces.
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Distance
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The difference invelocity (dv) between two planes of a liquid separated by a distance (dx) is the velocity gradient or a ___________
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Rate of shear (dv/dx)
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The force per unit area (F/A) needed to bring about this flow is known as the ___________
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Shearing stress
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The higher the viscosity of a liquid, the __________ is the shearing stress (F/A) needed to yield a certain rate of shear (dv/dx).
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Greater
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The reciprocal of viscosity is called
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Fluidity or mobility φ = 1/η
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Materials are classified into two general types depending upon their flow properties
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1.) Newtonian 2.) Non-newtonian
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When the relationship between the shear stress and rate of shear is directly proportioned, it is described as a__________
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Newtonian flow
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The slope of the rheogram for newtonian system is the ___________
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Mobility
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