What are the three ways to determine viscosity?

Ways to Measure Viscosity

• Capillary Viscometer.
• Zahn Cup.
• Falling Sphere Viscometer.
• Vibrational Viscometer.
• Rotational Viscometer.

How do you find the coefficient of viscosity?

viscosity: The Coefficient of Viscosity The ratio of the shearing stress to the velocity gradient is a measure of the viscosity of the fluid and is called the coefficient of viscosity η, or η=Fx/Av. The cgs unit for measuring the coefficient of viscosity is the poise.

What are the different methods of determining the coefficient of viscosity of a liquid?

Capillary Viscometer: One of the oldest methods of measuring viscosity, the capillary viscometer measures the time between the volume of liquid/sample to pass through the length of the capillary tubes. Rotational Viscometer: Measures the torque required to revolve an object within the volume of liquid.

What is coefficient of viscosity and how it can be determined?

There are two types of the coefficient of viscosity. Dynamic viscosity: Dynamic viscosity(η) normally called viscosity is the ratio between the shearing stress (F/A) to the velocity gradient (dvx/dz) in a fluid. η = (F/A)/(dvx/dz)

What is viscosity method?

Viscosity is the measure of a substance’s resistance to motion under an applied force. The formula for measuring viscosity is fairly simple: viscosity = shear stress / shear rate. The result is typically expressed in centipoise (cP), which is the equivalent of 1 mPa s (millipascal second).

Which method can be used to determine the viscosity of gas?

The viscosity of a gas provides a means for determining molecular diameters, as viscosity arises from collisions among molecules. A gas sample is drawn through a thin capillary tube. The change in pressure of the system is measured with a manometer as a function of time.

What is coefficient of viscosity and describe the Ostwald’s method to measure the coefficient of viscosity of a liquid?

Ostwald viscometer is use to determine viscosity of Newtonian fluid. When the liquid flow by gravity time required for the liquid to pass between two mark A and B through the capillary tube is determined.

Which one of the following method can be used to determine the viscosity of gas?

Falling ball viscometers A falling ball viscometer measures the viscosity of fluids and some units can also measure the viscosity of gases.

How can the coefficient of viscosity of a highly viscous liquid The determined by Stokes method?

When a body falls through a highly viscous liquid, it drags the layer of the liquid immediately in contact with it. This results in a relative motion between the different layers of the liquid. This is Stoke’s law.

What is viscosity meter?

A viscometer, viscosity meter or rheometer is a measuring instrument used to determine a fluid’s internal flow resistance or viscosity. The term viscosity typically refers to shear viscosity, i.e., how a material reacts to being sheared. A viscometer can be an important component in process and quality control.

What is the coefficient of viscosity of gas?

5. Typical Viscosity Coefficient Values

How does the coefficient of viscosity depend on temperature?

The coefficient of viscosity of fluids will be decreased as the temperature increases, while it is inverse in the case of gases. While the coefficient of viscosity of gases will increase with the increase in temperature. The increase in temperature for the fluid deliberate the bonds between molecules.