Rotary viscometer viscosity tester fluid meter lcd display. Newtons law of viscosity, given above, is a constitutive equation like. This type of viscometer consists of a circular cylinder filled by the liquid under investigation. Determination of viscosity of organic solvents procedure. It consists of capillary tube and two reservoir bulbs 3. The about screen is shown below and includes several critical parameters about the viscometer including. The second one is the saybolt viscometer which is useful only for.
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. Because this type of viscometer is vertical to the ground, it will be referred to here as a vertical falling ball viscometer. Measuring ranges overlap, but the best results will be obtained if you are operating near the center of the viscometers range. Calculation of viscometer constants for cannonfenske routine. Ostwald viscometer is use to determine viscosity of newtonian fluid. The very definition of viscosity implies the existence of what is called laminar flow. D bottle known as pyknometer also, stand, beaker, unknown liquid, distilled water. During the course of this experiment, pick one of the sand grains near the front of the syrup flow and watch how it moves down the slope. The known volume of the liquid is indicated by the mark found above and below the upper bulb of the viscometer. Calculation of viscometer constants for cannonfenske routine and cannonfenske opaque viscometers certain modified ostwald type viscometers for transparent liquids like the cannonfenske routine and the cannonmanning semimicro and reverseflow viscometers for opaque and. The force of friction which one part of the liquid offers to another part of the liquid is called viscosity. Lower the viscometer until the surface of the liquid exactly. Analysis of kinematic viscosity for liquids by varying. Results and discussion plots of data from table 1 in linear and logarithmic scale for h againts t are given in.
Laboratory manual for eas 361 engineering fluid mechanics. Bsu tube glass capillary viscometers are ideal for measuring the kinematic viscosity of transparent newtonian fluids within a range of 0. Fluids lab 1 fall 2003 viscosity objectives of the. The experiment is carried out on redwood viscometer to analyze viscosity of different liquids at different temperatures. To determine the variation of viscosity of lubricating oil and coconut oil with temperature introduction. But if you are asked to define it and explain its origin, things quickly get sticky. The viscometer will issue a beep, present a blue screen, and finally show the dv2t about screen for 5 seconds. Always wear lab coat and gloves when you are in the lab.
Group i 1 to find out type of alkalinity and estimate alkalinity present in the given water sample. The viscometer is meant to approximate an infinitely long column of infinite diameter. Viscosity measurement using ostwalds viscometer amrita. For more accurate measurements it is held in a controlled temperature bath. Do not attempt to operate the viscometer with the shipping cap in place.
Calculation of viscometer constants for cannonfenske routine and cannonfenske opaque viscometers certain modified ostwaldtype viscometers for transparent liquids like the cannonfenske routine and the cannonmanning semimicro and reverseflow viscometers for opaque and. Interpretation of viscometer test results for polymer support fluids carlos lam1 and stephan a. Viscometers, monitor and control, safety, consumables. Amrita virtual lab project website ostwalds viscometer is a traditional viscometer to measure the viscosity of a liquid. Sibata viscometers are glass capillary tube viscometers manufactured in accordance with. The internal property of a fluid for its resistance to flow is known as viscosity.
To determine the viscosity and effect of concentration of unknown solution using a ostwald viscometer. The forces acting on a sphere falling in a falling ball viscometer consist of force due to gravity f g, force due to the buoyancy of the solution f. Viscosity is a measure of the resistance of fluid to an applied stress. Viscosity of liquids can be measured with a special piece of glassware called a viscometer see figure 1. To do this, use the adjustment screws of the support base and control the adjustment with the help of the spirit level on the viscometer. In 1844 hagenpoiseuille did their work concerning the interpretation that liquid flow through tubes and he proposed an equation for viscosity of liquids. See other formats the redwood viscometer by winslow h. Points to remember while performing the experiment in a real laboratory.
To learn more about viscosity, how it varies relative to temperature, and to demonstrate one method of how it. Herschel abstract the redwood viscometer was selected for calibration because there appeared to be some doubt whether or not the instrumental constants varied with the temperature. Components of the simple viscometer and after they assambled are given in figure 5. R viscosity measurements with the falling ball viscometer 1. The rotary viscometer must be adjusted until it is exactly vertical. Experiment v viscosity of oil by the rotating cylinder method.
A viscometer also called viscosimeter is an instrument used to measure the viscosity of a fluid. Original fungilab viscometer for essential viscosity measurements, digital and easy to use. This type of work assumes more importance as the amount of experimental work in collection and correlation of properties such as viscosity, thermal. Most of us think we have an intuitive feel for viscosity liquid nitrogen is runny. Practical manual shri ramdeobaba college of engineering. Liquid viscosity measurement using capillary tube viscometer, cone and.
Viscometers that can characterize nonnewtonian fluids are usually called rheometers or plastometers. Determination of the molecular weight of a polymer from intrinsic viscosity measurements fig. Includes a calibration certificate with a constant values at 40c and 100c and a precision of 0. It is commonly known as utube viscometer or capillary viscometer. Thus, a rheometer can be considered as a special type of viscometer. Viscometer precision bath page 290 glass viscometers page 291 to 292 monitor and control apparatus pages 293 to 297 glass thermometers pages 296 to 297 laboratory reactors pages 298 to 299 filters pages 300 to 301 analytical consumables pages 302 to 311. A singular capillary viscometer is the tube of viscometry, which is used to measure the viscosity of suspensions 14.
The purpose of this lab is to determine the viscosities of two different oil samples using a falling ball viscometer and to perform a full uncertainty analysis. Measurement of viscosity by saybolt viscometer performed by. In industry viscometer and rheometer are traditionally used for the quality control in order to determine these physical features. A weight, w, is used to drive a rotor that is partially submerged in a sample of liquid. Determination of viscosity of organic solvents theory. Viscosity of liquids, ostwald capillary viscometer, poiseuilles equation, macromolecules, mass average and number average. Determination of saybolt, kinematic, and shear viscosity. It is not an instrument for field service and should. Determine the absolute viscosity of organic liquids. A simple viscometer for high school and first years. Let the liquid to flow through the capillary tube with run time when the liquid reaches the mark shown on the viscometer and then stopped time when the liquid reaches the bottom mark. Determination of saybolt, kinematic, and shear viscosity for a variety of liquids. A standard ball is allowed to fall down this tube over a calibrated distance of 100 mm.
Apr 27, 2015 falling sphere viscometer the falling ball viscometer is based on stokes law. Viscosity and viscoelastic behavior of resins are very critical in composites manufacturing. In this case, the equation for the dynamic viscosity is as follows. Experiment v viscosity of oil by the rotating cylinder method brendan arnold 27th april 2003 abstract we measured the viscosity, of energol oil using searles originalrotatingcylindermethod but with signi cantimprovementsindata collection. A new method of accurate calculation of the coefficient of viscosity of a test liquid from experimentally measured terminal velocity of a ball falling in the test liquid. Law using a syringe pascals ball aparatus communicating vessels finding the density of a liquid with a utube open tube manometer hares apparatus cartesian diver bernoullis principle venturis tube the ostwald viscometer capillary tube. For nonnewtonian liquids method c using the rotating viscometer may be used. Experiment v viscosity of oil by the rotating cylinder. Melab1b group5 measurement of viscosity by saybolt viscometer. Experiment 3 experiment no 3 measurement of viscosity of.
The distillates were characterised in part by viscometry. For the most viscous glops, he used carl englers viscometer. To determine the kinematic viscosity of four grades of motor oil at various temperatures using a saybolt viscometer. Viscometer in chemical applications viscometer basic information the viscosity rheology describes by means of a measurement the flow behavior of the liquids and gases. Instruction manual model 1602 rolling ball viscometer chandler. In everyday terms it is like the thickness of a fluid or gas. Repeat the experiment and record the results take average of results. Fluids lab 1 fall 2003 viscosity objectives of the experiment. Results and discussion plots of data from table 1 in linear and logarithmic scale for h. One way to measure viscosity is through the use of ostwald. Also, at the conclusion of the experiment, be sure to dispose of the used motor oil properly. The redwood viscometer consists of vertical cylindrical oil cup with an orifice in the centre of its base. Determination of the liquid permeability of consolidated cores experiment 4. Determination of viscosity with ostwald viscometer theory transport processes in a transport process, some quantity is transported from one place to another.
Put viscometer vertically in the water bath at the desired temperature. Jefferis2 1lecturer, school of mechanical, aerospace and civil engineering, the university of manchester, manchester, m 9pl, u. In the honour of hagenpoiseuille the unit of viscosity is called the poise p. Interpretation of viscometer test results for polymer. One way to measure viscosity is through the use of ostwald viscometer. Redwood viscometer thermometer 0100c 2 nos stop watch 50 ml standard narrow necked flask given sample of oil description. The viscometer and test assembly should be stored, when not in service, at room temperature. A falling ball viscometer has a sphere ball that falls down along a tube containing the sample liquid to be measured, and this tube is surrounded concentrically by a tubular jacket for thermal control. Determination of saybolt, kinematic, and shear viscosity for. To build up the concept of poiseuilles law and correlate the effect of flow time and viscosity. The determination of viscosity of newtonian liquids is carried out by means of a capillary viscometer unless otherwise specified.
Viscometer in oil and lubricant applications viscometry of oils and emulsions in all industrial application fields, in which oils, gels and emulsions are pumped, stirred and filtered as well as are treated physically and chemically in product circulations, the flowability of these substances plays a very important plant engineering role. Prepare a stock solution 20 mgml of polystyrene in toluene by. A good survey of the viscosity data, its critical evaluation and correlation would help design engineers, scientists and technologists in their areas of interest. Measurement of viscosity in a vertical falling ball viscometer. Determination of the molecular weight of a polymer from. Determination of viscosity by using ostwaldtype, suspended. Fluid is drawn up from the cup on the lower left into the tube on the right, using a suction bulb. The redwood viscometer consist of vertical cylindrical oil cup with an orifice in the centre of its base. Ostwald viscometer is a commonly used viscometer, which consists of a ushaped glass tube held vertically.
Determination of the molecular weight of a polymer from lec. Target customers oil industry, petrol industry, inks and solvents, paint, food, detergents, cosmetic, pharma and chemical industries low budget and entry level customers. Calculation of viscometer constants for cannonfenske. Pdf suitability of viscosity measurement methods for. Depending on a number of factors, there is a certain maximum speed at which one layer of fluid can move with. Viscosity of newtonian and nonnewtonian liquids rotary. Haake viscometer standard operating procedure updated sept. Rotational viscometer alpha series allows fast and accurate viscosity readings. Haake viscometer standard operating procedure updated sept 10, 2014 general information viscosity is a measure of the resistatnce of a fluid which is being deformed by either shear stress of tensile stress. When you enter the lab, switch on the exhaust fan and make sure that all the chemicals and reagents required for the experiment are available. Determination of viscosity of organic solvents animation. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext.
Experiment value of parameters in experiment are r i 4. Determination of viscosity of liquid using ostwald viscometer. Level the viscometer, referring to the bubble level on the instrument. Stokes law can be used to calculate the viscosity of the fluid. Ostwald viscometer, rubber tube with screw pinch cock, relative density r. A series of steel ball bearings of different diameter are normally used in the classic experiment to improve the accuracy of the calculation. I oscar viscometer, a sealed can of fluid was oscillated torsionally, and by clever measurement techniques it was possible to measure both viscosity and elasticity in the sample. See astm d445 and d2515 for more complete instructions. Determination viscosity of a fluid value by saybolt viscometer. X i where j i is the flux of the i th species the transported extensive quantity per unit area and time, l i the conductivity coefficient, x. Thus, by knowing m, g, h, t, r, n1 andn2 from the experiment the mass moment of inertia i. The time of flow of liquid under test is compared with time required for the liquid of known viscosity, the viscosity of unknown liquid. Oct 17, 2015 viscosity measurement using ostwald viscometer 1. Determination of viscosity by using ostwald type, suspendedlevel and rotating viscometer ankur choudhary print question forum no comments the determination of viscosity of newtonian liquids is carried out by means of a capillary viscometer unless otherwise specified.
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