Stoke’s method or Stoke’s law is a mathematical equation that expresses the velocities of the small spherical objects in a fluid medium and says that any object when rises or falls through a fluid it will experience a frictional or drag force because of the fluid. The Coefficient of Viscosity Using Stoke’s Method

And this depends on its temperature and composition. s, indicating a high resistance to flow.Molten Glass: The coefficient of viscosity for molten glass can range from around 10^2 to 10^8 Pa.The viscosity of gases is considerably lower than that of fluids and this low viscosity allows air to flow easily. The coefficient of viscosity for air at atmospheric pressure or room temperature is approximately 0.000018 Pa Air: Gases also have a coefficient of viscosity.Higher-viscosity oils have higher coefficients of viscosity. Motor oil is designed to have a higher viscosity compared to water and this ensures effective lubrication of engine components. Motor Oil: The coefficient of viscosity for motor oil has a wide range, from 20 to 100 centistokes (cSt) or higher.This high viscosity gives honey its thick and slow-flowing characteristic. s or higher, depending on factors such as the honey type and the temperature.Honey: The coefficient of viscosity for honey can range from 10 to 20 Pa.This is considered a relatively low viscosity that allows water to flow easily and is one of the reasons why it is commonly used for viscosity comparisons. s (pascal-seconds) or 1 centipoise (cP).Water: The coefficient of viscosity for water at 20☌ is nearly 0.001 Pa.The coefficient of viscosity is a measure of how easily or difficult a fluid flows under the effect of external forces, and it plays a very important role in many industrial, scientific, and everyday applications. d is the distance between the two layers of liquid skidding over each other.F is the force required to maintain a unit velocity gradient between two parallel layers of liquid of a unit area.The coefficient of viscosity is given by the following relation: The coefficient of viscosity is the ratio of the shearing stress to the velocity gradient of the fluid (η). Now, let’s define the coefficient of viscosity: It is given by v/x, where v is the velocity difference and x is the difference of distance between the two layers.

If more force is applied by the upper layer to move forward. The viscous gradient is the difference in the velocity between the fluid’s adjacent layers. The viscous gradient is the distinction inside the velocity among the fluid’s adjacent layers If more force is applied by the upper layer to move forward the more will be the viscous gradient. To understand what is meant by the coefficient of viscosity, you should understand the meaning of “The viscous grad ient” first. For example, the Newtonian fluid’s viscosity does not vary with the deformation rate. Note: The dependence on these factors may be negligible in certain cases. Viscosity depends on factors related to the fluid’s state, such as: Gases have viscosity like fluids but it is difficult to be noticed in ordinary circumstances. However, the low-viscosity fluid flows easily because its molecular makeup results in little or no friction in case of movement. Notice that a high viscosity of fluid resists motion because its molecular makeup gives it a variety of internal friction. This happens due to the viscosity of the material. You will notice that water flows much faster than honey, which flows very slowly and cannot be moved easily. It is a measure of a fluid’s resistance to flow and describes the internal friction of a fluid that is moving.įor further understanding, when you put some drops of honey on one side on an inclined surface and some water droplets on the other side and observe the flow of fluid. Viscosity can be defined as a force multiplied by a time divided by an area.

Determination of the Coefficient of Viscosity by Stoke’s Method Experiment From PraxiLabs.

The Coefficient of Viscosity Using Stoke’s Method.

Define viscosity you