Viscosity measurements are used in the food industry to maximize production efficiency and cost effectiveness . It affects the rate at which a product travels through a pipe, how long it takes to set or dry, and the time it takes to dispense the fluid into packaging.
What are the uses of viscosity?
- The oil used as a lubricant for heavy machinery parts should have a high viscous coefficient. ...
- The highly viscous liquid is used to damp the motion of some instruments and is used as brake oil in hydraulic brakes.
What are the uses of viscosity test of bitumen?
Viscosity test of the bitumen sample is one of the important tests on bitumen to be conducted before road construction. Viscosity measures the degree of fluidity of the bitumen sample. It ensures the quality of the bitumen used as a binder by giving a measure of fluidity at a particular temperature .
What device is used for the viscosity test?
Viscometer , instrument for measuring the viscosity (resistance to internal flow) of a fluid. In one version, the time taken for a given volume of fluid to flow through an opening is recorded.
How is viscosity tested?
There are two methods for determination of the viscosity of a material, kinematic and dynamic, and both can be determined under controlled temperature. The kinematic method uses gravity to force the sample through a glass viscometer (such as Ubbelohde) containing a capillary of known dimensions.
What is the unit of viscosity?
Dynamic viscosity: The SI physical unit of dynamic viscosity (μ) is the Pascal-second (Pa s) , which is identical to 1 kg m − 1 s − 1 . The physical unit for dynamic viscosity in the centimeter gram second system of units (cgs) is the poise (P), named after Jean Poiseuille.
What is a real life example of viscosity?
Examples of everyday liquids varying in viscosity: water, honey, shampoo, laundry detergent (from left to right). Even such static snapshots provide a clear impression of the fluids’ viscosity.
What is a good example of viscosity?
Some liquids, like pitch, glass and peanut butter , have such high viscosity they behave like solids. In common vernacular, a liquid is said to be “viscous” if its viscosity is substantially greater than that of water, and is described as “mobile” if the viscosity is noticeably less than water.
What are some real life examples of viscosity?
- Honey.
- Engine Oil.
- Brake Oil.
- Lubricant.
- Cooking Oil.
- Liquid Soap.
- Printing Ink.
- Super Glue.
What are the types of viscosity?
- Dynamic Viscosity. Dynamic viscosity measures the ratio of the shear stress to the shear rate for a fluid.
- Kinematic Viscosity. Kinematic viscosity measures the ratio of the viscous force to the inertial force on the fluid. ...
- Common Units. ...
- Newtonian Fluids. ...
- Non-Newtonian Fluids.
What is the principle of viscosity?
The principle of viscosity is stated here: When a layer of liquid is subjected to move upon a surface or another layer of the same liquid, the fluid particles tend to oppose such movement ; this resisting force developed by a liquid is called viscosity.
What are the different types of viscosity cup?
The various forms of viscosity cups use gravity to allow a fluid to flow through an orifice located at the bottom in a precise amount, which can be measured over time to calculate a viscosity value. The most common viscosity cups are Ford, Ford Dip, and Zahn cups.
Does temperature affect viscosity?
The liquid viscosity is highly affected by the heat. The viscosity decreases with an increase in temperature .
What is viscosity of water?
The viscosity of water at a temperature of 20 degrees Celsius is approximately 0.01 poise or 10 – 3 Pa. s (Pascal seconds). Viscosity is a measure of the resistance of a fluid to deformation at a given rate. For liquids such as water, viscosity can be perceived as a measure of the liquid’s resistance to flow.
Is high viscosity thick or thin?
Viscosity describes a fluid’s internal resistance to flow and may be thought of as a measure of fluid friction. Thus, water is “thin”, having a low viscosity, while vegetable oil is “thick” having a high viscosity .
What is the highest viscosity?
One of the most viscous liquids known is pitch , also known as bitumen, asphalt, or tar. Demonstrating its flow and measuring its viscosity is the subject of the longest continuously running scientific experiment, begun in 1927 at the University of Queensland in Australia.
