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Viscosity, Shear stress, Fluid Pages: The intrinsic viscosity of the solution was found along with other quantities such as shear stress and shear rate for example.

Introduction Viscosity is a significant property of materials, it is a measure of the resistance to deformation under shear stress. For example in petroleum, viscosity measures the effectiveness of lubricating oil also, when making concrete, it is important to know the self-levelling and pumping behaviour of the mixture.

This experiment was held in an undergraduate laboratory at City University London. This report will be presenting an experiment on viscosity measurement of glycerol — water mixtures with a Bohlin Visco 88 rotational viscometer.

Rotational viscometer provide ability to measure not only the viscosity of a fluid, but also shear rate and shear stress, torque, temperature and frequency of rotation.

Theory These quantities were measured, recorded or calculated: It arises from collisions of molecules in a fluid that hit each other due to different velocities of molecules. It is defined as a ratio of shear stress and shear rate.

Shear stress is a measure of a load on specific area, however differently from tensile stress, shear stress acts coplanar to a material cross section instead of acting perpendicular to the cross section. It is defined as force per unit area just like tensile strength and has the same units.

Shear rate is the rate of change of velocity at which adjacent layers of fluids pass over each other. Torque in viscosity terms is a measure of resistance exerted when rotating the viscometer.

Frequency is the number of full rotations per second. Dynamic viscosity can be given by the ratio of shear stress to shear rate: Experimental Arrangement Various rotational viscometers are in use for the determination of the viscosity of Newtonian liquids.

These types of material exhibit different viscosities depending on the applied shear rate. An electrical rotational viscometer was used in this experiment that would measure more than just the dynamic viscosity see above.

The cylinder had a volume of 15ml which had to be cleaned out after use. The viscometer had various speed settings, however if the component is rotating too fast it jeopardises the accuracy of the data it records.

As a failsafe the component displays HI on its screen to indicate to the experimenter that the speed is too high to give accurate results and should slow the component down.

The results were taken in two phases, speed-up and speed-down, the experimenter would start at the lowest speed take down all readings and move up a speed, however when the display shows HI the experimenter would then slow down the viscometer and take readings again.

As the cylinder with the solution rotated the viscometer would display the results meaning the experimenters had to write down two sets of data one for the speed-up and one for the speed-down cycle. Results Displayed below are the results of the experiment. The gradient of the shear stress versus shear rate graphs is the viscosity of that fluid.eNotes Homework Help is where your questions are answered by real teachers.

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arbnor emini lab report viscosity essay Lab 3 Viscosity Measurement Arbnor Emini B1, [email protected] Abstract The flow rates of a series of dilutions of glycerol solutions (% glycerol and 98% glycerol concentration) were measured using a viscometer.

arbnor emini lab report viscosity essay Lab 3 Viscosity Measurement Arbnor Emini B1, [email protected] Abstract The flow rates of a series of dilutions of glycerol solutions (% glycerol and 98% glycerol concentration) were measured using a viscometer.

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Lab 3 Viscosity Measurement Arbnor Emini B1, [email protected] Abstract The flow rates of a series of dilutions of glycerol solutions (% glycerol and 98% glycerol concentration) were measured using a viscometer. Mar 01, · Lab 3 Viscosity Measurement Arbnor Emini B1, [email protected] Abstract The flow rates of a series of dilutions of glycerol solutions (% glycerol and 98% glycerol concentration) were measured using a viscometer. The intrinsic viscosity of the solution was found along with other quantities such as shear stress and shear rate for example. Homework resources for K students including online resources and databases, online tutoring, and hours and information about in-library tutors.

Lab 3 Viscosity Measurement Arbnor Emini B1, [email protected] Abstract The flow rates of a series of dilutions of glycerol solutions (% glycerol and 98% glycerol concentration) were measured using a viscometer.

The intrinsic viscosity of the solution was found along with other quantities such as shear stress and shear rate for example. Homework resources for K students including online resources and databases, online tutoring, and hours and information about in-library tutors.

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