In addition, the biotin content is also considerable. The content of pantothenic acid in sucrose is higher, reaching 37mg/kg. Molasses is a viscous, dark brown, semi-liquid object. Read more about: Coriolis Mass Flowmeter Working Principle Properties of molasses It also contains colloidal particles that are not completely dissolved.įor example solutions of rubber, paraffin, cellulose acetate, viscose, polyacrylonitrile, paint and animal glue. What’s more, the liquid contains some dust in addition to it. The activity is slow and it is very difficult to filter with simple methods. It is different from general liquids and non-Newtonian fluids (mud, pulp). The so-called high-viscosity liquid means that the liquid is viscous and thick. The viscosity of different fluids varies greatly.Īt a pressure of 101.325kPa and a temperature of 20☌, the dynamic viscosity and kinematic viscosity of air, water and glycerin are: , K’have nothing to do with concentration. In the formula, is the intrinsic viscosity of the solution. The relationship between relative viscosity and concentration C can be expressed as: Liquid viscosity decreases with increasing temperature, while gas viscosity increases with increasing temperature.įor solutions, the relative viscosity μr is often used to indicate the ratio of the solution viscosity μ and the solvent viscosity μ. Viscosity changes significantly with temperature but usually changes little with pressure. Express the viscosity under a certain (τ/D) with ηa, which is called the apparent viscosity. Viscosity is only related to temperature, not to shear rate.Įxtended reading: Fluid flow meter types Non-Newtonian fluid:ĭoes not conform to the Newtonian formula τ/D=f(D). Newtonian fluid:Ī fluid that conforms to Newton’s formula. If the relative speed between the two plates is 1m/s, the viscosity of the liquid is 1Pa If a 1N shear stress is applied to a certain board. Immerse two plates with an area of 1 square meter in the liquid, and the distance between the two plates is 1 meter. Generally speaking, when it is abbreviated as viscosity without distinction, it usually refers to shear viscosity. In addition, extensional viscosity and shear viscosity are usually used more often. The proportional coefficient η is defined as the shear viscosity of the liquid. The relationship between shear rate and shear stress is as follows: Called the shear rate, expressed by r’.į/A is called the shear stress and is represented by τ. Each layer of liquid also moves accordingly. Now a thrust force F is applied to the upper plate to generate the force required for a degree of speed change.ĭue to the effect of viscosity, the object is subjected to frictional resistance and differential pressure resistance when moving in the fluid, resulting in loss of mechanical energy.Įssentially, the more viscous a liquid is and the more resistant it is to flow, the higher its viscosity.ĭue to the viscosity of the liquid, this force layer is transmitted layer by layer. The plates are filled with a certain liquid. It is defined as a pair of parallel plates with an area of A and a distance of dr. Viscosity is a physical and chemical property of a substance. Viscosity is a value obtained by measuring the inherent frictional force of a fluid.
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