Rotary viscometer viscosity tester fluid meter lcd display. The determination of viscosity of newtonian liquids is carried out by means of a capillary viscometer unless otherwise specified. It consists of capillary tube and two reservoir bulbs 3. The viscometer and test assembly should be stored, when not in service, at room temperature. The redwood viscometer consist of vertical cylindrical oil cup with an orifice in the centre of its base. Determination of viscosity of liquid using ostwald viscometer.
Thus, by knowing m, g, h, t, r, n1 andn2 from the experiment the mass moment of inertia i. Determination of the molecular weight of a polymer from lec. Viscosity measurement using ostwalds viscometer amrita. For nonnewtonian liquids method c using the rotating viscometer may be used. For liquids with viscosities which vary with flow conditions, an instrument called a rheometer is used. A good survey of the viscosity data, its critical evaluation and correlation would help design engineers, scientists and technologists in their areas of interest. 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. The need for properties is ever increasing to make processes more economical.
It is not an instrument for field service and should. 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. Ostwald viscometer is use to determine viscosity of newtonian fluid. Analysis of kinematic viscosity for liquids by varying.
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. The distillates were characterised in part by viscometry. In 1844 hagenpoiseuille did their work concerning the interpretation that liquid flow through tubes and he proposed an equation for viscosity of liquids. A singular capillary viscometer is the tube of viscometry, which is used to measure the viscosity of suspensions 14. See astm d445 and d2515 for more complete instructions. Stokes law can be used to calculate the viscosity of the fluid. Haake viscometer standard operating procedure updated sept. Viscosity of newtonian and nonnewtonian liquids rotary.
Experiment v viscosity of oil by the rotating cylinder. 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. The second one is the saybolt viscometer which is useful only for. The viscometer will issue a beep, present a blue screen, and finally show the dv2t about screen for 5 seconds.
Because this type of viscometer is vertical to the ground, it will be referred to here as a vertical falling ball viscometer. Apr 27, 2015 falling sphere viscometer the falling ball viscometer is based on stokes law. 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. Repeat the experiment and record the results take average of results. Experiment 1 viscosity measurement purpose the purpose of this experiment is to measure the viscosity of a glycerinwater mixture with a thomasstormer viscometer. Redwood viscometer thermometer 0100c 2 nos stop watch 50 ml standard narrow necked flask given sample of oil description.
Also, at the conclusion of the experiment, be sure to dispose of the used motor oil properly. Put viscometer vertically in the water bath at the desired temperature. D bottle known as pyknometer also, stand, beaker, unknown liquid, distilled water. 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. 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. Target customers oil industry, petrol industry, inks and solvents, paint, food, detergents, cosmetic, pharma and chemical industries low budget and entry level customers.
Measuring ranges overlap, but the best results will be obtained if you are operating near the center of the viscometers range. 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. Results and discussion plots of data from table 1 in linear and logarithmic scale for h againts t are given in. See other formats the redwood viscometer by winslow h. The time of flow of liquid under test is compared with time required for the liquid of known viscosity, the viscosity of unknown liquid. To determine the kinematic viscosity of four grades of motor oil at various temperatures using a saybolt viscometer. Fluid is drawn up from the cup on the lower left into the tube on the right, using a suction bulb. Determination of viscosity by using ostwaldtype, suspended. Instruction manual model 1602 rolling ball viscometer chandler. For the most viscous glops, he used carl englers viscometer. Always wear lab coat and gloves when you are in the lab. In industry viscometer and rheometer are traditionally used for the quality control in order to determine these physical features. Determination of saybolt, kinematic, and shear viscosity for. Determination of saybolt, kinematic, and shear viscosity for a variety of liquids.
Points to remember while performing the experiment in a real laboratory. A viscometer also called viscosimeter is an instrument used to measure the viscosity of a fluid. The internal property of a fluid for its resistance to flow is known as viscosity. Determination of the molecular weight of a polymer from. To build up the concept of poiseuilles law and correlate the effect of flow time and viscosity. In everyday terms it is like the thickness of a fluid or gas. Determination of saybolt, kinematic, and shear viscosity. In the honour of hagenpoiseuille the unit of viscosity is called the poise p. Determination of viscosity of organic solvents theory. Liquid viscosity measurement using capillary tube viscometer, cone and. To determine the viscosity and effect of concentration of unknown solution using a ostwald viscometer.
Newtons law of viscosity, given above, is a constitutive equation like. Experiment value of parameters in experiment are r i 4. Fluids lab 1 fall 2003 viscosity objectives of the. The known volume of the liquid is indicated by the mark found above and below the upper bulb of the viscometer. One way to measure viscosity is through the use of ostwald. In this case, the equation for the dynamic viscosity is as follows. Ostwald viscometer, rubber tube with screw pinch cock, relative density r. Determination of the liquid permeability of consolidated cores experiment 4. The experiment is carried out on redwood viscometer to analyze viscosity of different liquids at different temperatures. Viscosity and viscoelastic behavior of resins are very critical in composites manufacturing. It is particularly important to remember the following points.
Fluids lab 1 fall 2003 viscosity objectives of the experiment. Viscometers that can characterize nonnewtonian fluids are usually called rheometers or plastometers. A weight, w, is used to drive a rotor that is partially submerged in a sample of liquid. 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. A simple viscometer for high school and first years. 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. Determination of viscosity with ostwald viscometer theory transport processes in a transport process, some quantity is transported from one place to another. A standard ball is allowed to fall down this tube over a calibrated distance of 100 mm. For more accurate measurements it is held in a controlled temperature bath. Viscometer in chemical applications viscometer basic information the viscosity rheology describes by means of a measurement the flow behavior of the liquids and gases. To learn more about viscosity, how it varies relative to temperature, and to demonstrate one method of how it is measured. Includes a calibration certificate with a constant values at 40c and 100c and a precision of 0. Melab1b group5 measurement of viscosity by saybolt viscometer.
This type of viscometer consists of a circular cylinder filled by the liquid under investigation. To learn more about viscosity, how it varies relative to temperature, and to demonstrate one method of how it. Depending on a number of factors, there is a certain maximum speed at which one layer of fluid can move with. Practical manual shri ramdeobaba college of engineering. 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. Measurement of viscosity in a vertical falling ball viscometer. Thus, a rheometer can be considered as a special type of viscometer. Pdf suitability of viscosity measurement methods for. Amrita virtual lab project website ostwalds viscometer is a traditional viscometer to measure the viscosity of a liquid. Experiment v viscosity of oil by the rotating cylinder method. Group i 1 to find out type of alkalinity and estimate alkalinity present in the given water sample.
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. Pdf suitability of viscosity measurement methods for liquid. 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. 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. 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. Jefferis2 1lecturer, school of mechanical, aerospace and civil engineering, the university of manchester, manchester, m 9pl, u. 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. Prepare a stock solution 20 mgml of polystyrene in toluene by.
Determination of viscosity of organic solvents animation. 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. But if you are asked to define it and explain its origin, things quickly get sticky. The about screen is shown below and includes several critical parameters about the viscometer including. Ostwald viscometer is a commonly used viscometer, which consists of a ushaped glass tube held vertically.
Rotational viscometer alpha series allows fast and accurate viscosity readings. Laboratory manual for eas 361 engineering fluid mechanics. Most of us think we have an intuitive feel for viscosity liquid nitrogen is runny. The very definition of viscosity implies the existence of what is called laminar flow. The redwood viscometer consists of vertical cylindrical oil cup with an orifice in the centre of its base. This type of work assumes more importance as the amount of experimental work in collection and correlation of properties such as viscosity, thermal. Sibata viscometers are glass capillary tube viscometers manufactured in accordance with.
Oct 17, 2015 viscosity measurement using ostwald viscometer 1. A series of steel ball bearings of different diameter are normally used in the classic experiment to improve the accuracy of the calculation. 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. To determine the variation of viscosity of lubricating oil and coconut oil with temperature introduction. Determine the absolute viscosity of organic liquids. Components of the simple viscometer and after they assambled are given in figure 5. Do not attempt to operate the viscometer with the shipping cap in place. Interpretation of viscometer test results for polymer. It is commonly known as utube viscometer or capillary viscometer. Viscometers, monitor and control, safety, consumables. Level the viscometer, referring to the bubble level on the instrument.
Experiment 3 experiment no 3 measurement of viscosity of. Calculation of viscometer constants for cannonfenske. R viscosity measurements with the falling ball viscometer 1. The rotary viscometer must be adjusted until it is exactly vertical. Calculation of viscometer constants for cannonfenske routine.
Determination viscosity of a fluid value by saybolt viscometer. 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. One way to measure viscosity is through the use of ostwald viscometer.
Viscosity of liquids, ostwald capillary viscometer, poiseuilles equation, macromolecules, mass average and number average. Results and discussion plots of data from table 1 in linear and logarithmic scale for h. Original fungilab viscometer for essential viscosity measurements, digital and easy to use. Bsu tube glass capillary viscometers are ideal for measuring the kinematic viscosity of transparent newtonian fluids within a range of 0. Determination of viscosity of organic solvents procedure. Measurement of viscosity by saybolt viscometer performed by. Viscosity of liquids can be measured with a special piece of glassware called a viscometer see figure 1. Viscosity is a measure of the resistance of fluid to an applied stress. The viscometer is meant to approximate an infinitely long column of infinite diameter. 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.
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. 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. Interpretation of viscometer test results for polymer support fluids carlos lam1 and stephan a. Determination of the molecular weight of a polymer from intrinsic viscosity measurements fig.
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