The different types of viscosity measurement devices are explained, such as portable viscosity testers, falling sphere viscometers, piston viscometers, and u tube viscometers. Determination of saybolt, kinematic, and shear viscosity for a variety of liquids. Automatic redwood viscometer no 1 apparatus this instrument determines viscosity of oils automatically with integrated micro controller based thermo regulator and 16x2 alphanumeric lcd display. The viscosity index is an arbitrary number indicating the effect of change of temperature on the kinematic viscosity of an oil. Astm d6606002010 standard test method for viscosity and yield of vehicles. If you wish to study viscosity in rotation, anton paars viscoqc 100300 and. Anton paars viscometers have revolutionized viscosity measurement. Attach the spindle lefthand thread to the viscometer lower shaft by lifting the. Calculation of viscosity index the viscosity index of an oil is calculated from its viscosities at 40 and 100c. Sep 18, 2015 the saybolt viscometer controls the heat of the fluid and the viscosity is the time is takes the fluid to fill a container. Determination of saybolt, kinematic, and shear viscosity for. Brookfield dial reading viscometer with electronic drive.
Temperature dependent dynamic absolute viscosity of oil. Calculate viscosity of crude oil by redwood viscometer semantic. Thus, a rheometer can be considered as a special type of viscometer. Standard ip 70 these instruments are for determining the viscosity of all oils, expressed in redwood seconds at the temperatures of test as called for by ip 70. There are various instruments, called viscometers, for measuring viscosity. Measurement of viscosity in a vertical falling ball viscometer. A standard britishtype 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. Determination of viscosity of lubricant by red wood viscometer no. Each model is available with 1, 2, or 3 positions, and comes equipped with brass oil cup with closingball ended rod, cup cover, and leveling screws to ensure accurate results. Viscosity arises from the internal friction of a fluid and is defined as a liquids resistance to flow or shear stress. This might be as simple as a utube viscometer that.
A redwood viscometer is used to measure the flow of eight different liquids including engine oil, sunflower oil, soybean oil, glycerol, thermic fluid hytherm, coconut oil, water and ghee. If the filling temperature t p is substantially different than room temperature, the viscometer constant at test ten1perature t is co 1 b tt t pd. For liquids with viscosities which vary with flow conditions, an instrument called a rheometer is used. Redwood viscometer thermometer 0100c 2 nos stop watch 50 ml standard narrow necked flask given sample of oil description. Description of redwood viscometer the redwood viscometer, 3 which is standard in england, is of the same general efflux type as the engler, of germany, and the saybolt universal, which has been adopted as standard for lubri cating oils in the united states. Jul 30, 2019 redwood viscometer determines the viscosity in terms of seconds which are terms as redwood seconds, a time taken by oil to pass through a standard orifice and collection of the same oil in 50 cc flask. Mar 02, 2018 procedure redwood viscometer experiment is explained in this video. A redwood viscometer is used to measure the flow of eight. Viscometers measure the viscosity and flow properties of fluids.
The conversion of redwood seconds to kinematic units was first investi gated by higgins,7 who, in 19 put forward the formula. If the filling temperature t p is substantially different than room temperature, the viscometer constant at test ten1perature t is co 1 b tt t. With the svm viscometer series and the lovis 2000 mme rollingball viscometer. Mount the guard leg, if used, spindle protector on the viscometer. With the svm viscometer series and the lovis 2000 mme rollingball viscometer, viscosity determinations are quicker and easier than ever before. Engineering toolbox resources, tools and basic information for engineering and design of technical applications. Redwood viscometer article about redwood viscometer by. A high viscosity index signifies a relatively small change of kinematic viscosity with. A constant of the instrument no units b constant of the instrument no units t viscosity of the oil.
Test results are reported in seconds, stating which viscometer was used and the test ternperature for example, viscosity redwood no. Kinematic viscosity, redwood viscometer, thermal degradation, ftir spectroscopy. A rotational viscometer can consist of a coneandplate arrangement figure 9, or concentric cylinders with the sample material in the annular space between them figure 10. The redwood viscometer is used to determine the kinematic viscosities unit centistokes of different liquids like engine oil, glycerol, sunflower oil, soybean oil, coconut oil, thermic fluid, water and ghee at. The falling ball viscometer is wellsuited for measuring the viscosity of a fluid, and the method has been stated in international standards.
Determination of viscosity of oil by redwood viscometer. Practical manual shri ramdeobaba college of engineering and. Procedure clean the viscometer cup properly with the help of suitable solvent e. Redwood viscometer determines the viscosity in terms of seconds which are terms as redwood seconds, a time taken by oil to pass through a standard orifice and collection of the same.
The viscometer is available in either redwood orifice no. Redwood viscometer viscosity test ayalytical instruments. Take care to avoid trapping air bubbles under the spindles, especially the disktype. The standards describe an inclinedtube method in which the tube for the falling ball was inclined at 10. Temperature control is realized via liquid bath thermostat, while an operator manually performs measurement and cleaning. Viscosity may be expressed as dynamic or absolute viscosity, kinematic viscosity or. Pdf analysis of kinematic viscosity for liquids by. Procedure redwood viscometer experiment is explained in this video. Redwood viscometer lab manual by briancordon2668 issuu.
Business listings of redwood viscometer manufacturers, suppliers and exporters in delhi. The viscosity of ea ch liquid found at temperature 50, 55, 60, 65, 70, 75 and 80 o c. Redwood viscometer exporters, specifications, suppliers. Target customers oil industry, petrol industry, inks and solvents, paint, food, detergents, cosmetic, pharma and chemical industries low budget and entry level customers. The engler apparatus consists essentially of a cylin. The redwood viscometer consist of vertical cylindrical oil cup with an orifice in the centre of its base.
Ccl4, ether, petroleum spirit or viscosity benzene and dry it to remove any traces of. Hold it firmly with one hand while screwing the spindle on with the other note lefthand thread. It consists 4 x4 matrix key pad for input parameters and setting. Viscosity of newtonian and nonnewtonian liquids rotary. A constant of the instrument no units b constant of the instrument no units t viscosity of the oil redwoods second. Viscometers are instruments that can either apply a force and measure a speed, or apply a speed and measure a force, to or from a simple geometry. Originally redwood viscometer was developed for the measurement of viscosity of petroleum products. Feb 02, 2015 welllet me start with what these two viscometers are. Determination of viscosity of lubricant by red wood viscometer.
Determination of viscosity of organic solvents theory. Certain devices use other falling objects than balls, for. The redwood viscometer is used to determine the kinematic viscosities unit centistokes of different liquids like engine oil, glycerol, sunflower oil, soybean oil, coconut oil, thermic fluid, water and ghee at different temperatures and found the viscosities and relations between temperature and kinematic viscosity. Pdf analysis of kinematic viscosity for liquids by varying. Dynamic or absolute viscosity, oil, kinematic viscosity, redwood viscometer no.
Theredwoodviscometer,3whichisstandardinengland,isof the same general efflux type astheengler, of germany,and the saybolt universal, whichhasbeenadopted as standard for lubri. Efflux cup viscometers are most commonly used for fieldwork to measure the viscosity of oils, syrups, varnish, paints and bitumen emulsions. Assignment 2 the principles underpinning development and preparation of resources for learning and development developing resources to meet learning and development. Rotational viscometer an overview sciencedirect topics. Rubber latexdetermination of apparent viscosity by brookfield test method. Sep, 2017 redwood viscometer lab manual ppt free access for redwood viscometer lab manual ppt from our huge library or simply read online from your computer instantly. Welllet me start with what these two viscometers are. Original fungilab viscometer for essential viscosity measurements, digital and easy to use. Put viscometer vertically in the water bath at the desired temperature. Calculation of viscometer constants for cannonfenske.
With no spindle attached, lower the viscometer by turning the black knob on the right side of the clamp. A high viscosity index signifies a relatively small change of kinematic viscosity with temperature. Attach the spindle lefthand thread to the viscometer lower shaft by lifting the coupling screw slightly. Analysis of kinematic viscosity for liquids by varying. Calculation of viscometer constants for cannonfenske routine. Values valid for temperature 50 o c 122 o f can be used for approximate calculations between 20 o c 68 o f and 100 o c 212 o f kinematic viscosity chart. This might be as simple as a utube viscometer that measures the time taken for a gravitydriven flow to move from one vertical position to another, or a similar situation for flow from the hole at the bottom of a carefully manufactured cup called a.
The purpose of this experiment is to determine the viscosity with varying temperature of the liquids. Research journal of pharmaceutical, biological and chemical. A viscometer also called viscosimeter is an instrument used to measure the viscosity of a fluid. Clean the viscometer by the water and ethanol and dry it. That the error due to inaccuracy in the meissner formula for average head is negligible in ordinary. The viscosities of lubricating oils were determined by red wood viscometer no. Description of redwood viscometer the redwood viscometer, 3 which is standard in england, is of the same general efflux type as the engler, of germany, and the saybolt universal, which has been. Convert between centistokes, saybolt and redwood seconds. Determination of saybolt, kinematic, and shear viscosity. Efflux cup viscometers are most commonly used for fieldwork to measure. Depending on the viscosity of the sample a certain instrument with the accurate torque range has to be used table 1. Whenever laboratory data obtained were made to find a bestfit correlation due to the demand for mathematical equation of fluid flow for reservoir simulation.
Since recognized tables do not exist for the calculation of v. Put a certain amount of liquid in the large bulge viscometer and pull it by pipette until the small bulge is full. Reddy college of engineering department of mechanical engineering 3 therefore, i m2ght2 16. There are several types of viscosity measurement devices. Redwood viscometer article about redwood viscometer by the. The values of co and b shown below are based on a coefficient of thermal expansion typical to that for a mineral oil. Redwoods viscometer two thermometers stop watch measuring flask 50 ml 50 cc notations. Kinematic viscosity is determined by redwood viscometer with help of its constants. Practical manual shri ramdeobaba college of engineering. Rotational viscometer alpha series allows fast and accurate viscosity readings. Part of the instrument is rotated, and this leads to the sample being sheared. Automatic redwood viscometer no 1 apparatus this instrument determines viscosity of oils automatically with integrated micro controller based thermo regulator and 16x2 alphanumeric lcd. Put a certain amount of liquid in the large bulge viscometer and pull it by pipette until the small bulge is. Introduction the viscosity of a fluid is an important property in the analysis of liquid behavior and fluid motion near solid boundaries.
Viscosity index were calculated by the following formula. The hoeppler principle fritz hoppler, 1897 1955, german chemist, who designed this fallingball viscometer in 1933 7 conforms to din 53015 and iso 12058. Test results are reported in seconds, stating which viscometer was used and the test ternperature for example. The lmodel is suited for the measurement of lowviscosity samples, such as solvents. The saybolt viscometer controls the heat of the fluid and the viscosity is the time is takes the fluid to fill a container.
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