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Aug 3, 2021 · Viscosity Definition and Examples. Viscosity is a fluid’s resistance to flow. By definition, viscosity is a fluid’s resistance to flow or deformation. A fluid with a high viscosity, such as honey, flows as a slower rate than a less viscous fluid, such as water. The word “viscosity” comes from the Latin word for mistletoe, viscum.
Viscosity is first and foremost a function of material. The viscosity of water at 20 °C is 1.0020 millipascal seconds (which is conveniently close to one by coincidence alone). Most ordinary liquids have viscosities on the order of 1 to 1000 mPa s, while gases have viscosities on the order of 1 to 10 μPa s.
Jan 30, 2023 · The liquid is then drawn through the side 2 of the U-tube by use of suction and lastly, the flow is time between marks C and B. The viscosity is calculated with Equation 1 1. η = Kt (1) (1) η = K t. where K K is the value of a liquid with known viscosity and density such as water. Once the value of K is known, the viscosity can be determined ...
Oct 5, 2023 · Viscosity can be grouped into two categories based on fluid flow resistance – high and low. A high-viscosity fluid will be more viscous than a low-viscosity fluid. Fluids with low viscosity have a low resistance, shear quickly, and the molecules flow rapidly. On the other hand, high-viscosity fluids move languidly and resist deformation. Examples
Table 2.2.2 2.2. 2 lists the dynamic viscosities of several liquids at various temperatures in centipoise. The effect of the temperature on viscosity is clearly evidenced in the drastic drop in viscosity of water as the temperature is increased from near ambient to 60 degrees Celsius. Ketchup has a viscosity of 1000 cP at 30 degrees Celsius or ...
Jun 23, 2022 · Viscosity is governed by the strength of intermolecular forces and especially by the shapes of the molecules of a liquid. Liquids whose molecules are polar or can form hydrogen bonds are usually more viscous than similar nonpolar substances. Honey, mostly glucose and fructose (see image below) is a good example of a liquid which owes its ...
Summary. Viscosity (also known as dynamic viscosity, absolute viscosity, or simple viscosity) is…. represented by the Greek letter η (eta) defined informally as the quantity that describes a fluid's resistance to flow. defined mathematically as the ratio of the shearing stress ( F/A) to the velocity gradient ( ∆vx/∆y or dvx/dy) in a fluid.
