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Definition

"A viscometer (also called viscosimeter) is an instrument used to measure the viscosity of a fluid. For liquids with viscosities which vary with flow conditions, an instrument called a rheometer is used. Viscometers only measure under one flow condition."

(Engineering Tribology, Gwindo W.Stachowiak et al)

As stated in the definition, the researcher's objective is to measure the viscosity of a liquid at a number of temperatures and find the viscosity v.s. temperature equation for the liquid.

Description of Procedure:

The inner cylinder is filled to the marker level and the outer cylinder filled so as to have sufficient height to give good heat transfer. The surrounding water is heated with an electrical heating coil. Heat is transferred to the inner cylinder by rotation of the blades of the agitator.

The first reading is taken by removing the stopper from the orifice. The recorded values were the water and test liquid temperatures and the time to collect 50cc of the liquid being recorded. Both the beginning and end temperatures are noted.

The collected 50cc of liquid must be put back into the inner cylinder and the used cylinder inverted to empty completely. The level of the sample is checked as, if more of the liquid is needed it would be added. The temperature is then raised and the agitator is used again continuously. This is done until the liquid is brought within 1 degree of the water temperature. The same parameters were again measured. This procedure is repeated for 5 samples in total (at least).

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What is use of redwood viscometer 1?

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What is A and B in redwood viscometer?

In a redwood viscometer, A and B are constants used in the formula to calculate the viscosity of the fluid being tested. The formula is viscosity = A + B * time in seconds. The values of A and B are specific to the design of the redwood viscometer and are typically provided by the manufacturer.


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Who invented redwood viscometer?

The redwood viscometer was invented by Norman Henry Redwood, a British chemist and engineer, in the late 19th century. It was designed to measure the viscosity of liquids, particularly petroleum and related products.


What is the length and diameter of redwood viscometer?

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What are the errors of redwood viscometer experiment?

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Why you heat oil indirectly in redwood viscometer experiment?

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Where is use viscometer?

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Why there was a need of redwood viscometer?

A standard British-type viscometer in which the viscosity is determined by the time, in seconds, required for a certain quantity of liquid to pass out through the orifice under given conditions; used for determining viscosities of petroleum oils.


Why is Ostwald viscometer more important?

The Ostwald viscometer is important because it can accurately measure the viscosity of liquids, which is crucial in various industries such as food, pharmaceuticals, and manufacturing. It is simple in design and easy to use, making it a popular choice for viscosity measurements in research and quality control processes.