## Stokes method to find viscosity

Vector Addition and Subtraction: Graphical Methods The precise definition of viscosity is based on laminar, or nonturbulent, flow. Comparing frictionless flow in a tube to viscous flow, as in [link], we see that for a viscous fluid displaced fluid, while the drag force is assumed to be given by Stokes Law, {F}_{s}=\text{6}\ pi r  15 Jan 2015 There are several ways to find the kinematic viscosity of a fluid, but the most common method is determining the time it takes a fluid to flow  24 Oct 2018 There are several formulas and equations to calculate viscosity, the most common of which is Viscosity = (2 x (ball density – liquid density)

Viscosity Coefficient of a liqud by Stokes' method ... Nov 04, 2016 · Viscosity Coefficient of a liqud by Stokes' method Experiment Coefficient of Viscosity using Stokes method - YouTube mech props experiment Viscosity Stokes Method - YouTube Coefficient of Viscosity - MeitY OLabs - YouTube Feb 07, 2017 · For liquids, it corresponds to the informal concept of "thickness"; for example, honey has a much higher viscosity than water. the viscosity of liquids and gases are affected by temperature but in

## Viscosity of a liquid - Stoke's method (Theory) : Class 11 ...

MEASUREMENT OF VISCOSITY OF LIQUID Objectives: … by the dynamic viscosity η. For a sphere of radius r moving at velocity vin an infinitely extended fluid of dynamic viscosity η, G.G. Stokes derived an expression for the frictional force: F 1 6 r v (1) If the sphere falls vertically in the fluid, after a time, it will move at a constant Measurement of Viscosity in a Vertical Falling Ball Viscometer The drag coefficient of a sphere, C d, has been tested and the results plotted against the Reynolds number. 7–9 Assuming the inertia terms in the equation of motion of a viscous fluid can be disregarded in favor of the terms involving the viscosity, Stokes’ law states the drag coefficient as the form, C d = 24/Re. Figure 1 depicts the drag coefficient versus Reynolds number with the Determine viscosity using falling sphere (Stokes Law ... Introduction I am trying to determine the viscosity of a fluid. Therefore, I let a sphere of known mass m and radius r fall (sink) into the fluid. Determine viscosity using falling sphere (Stokes Law, Ladenburg correction) Ask Question so I cannot use Stokes Law "as it … Viscosity of a liquid - Stoke's method (Procedure) : Class ...

### This paper presents a novel method in viscosity assessment using a tracking of the ball moving in Our technique consist to measure the fall height by taking video sequences of the density ρ and viscous friction factor given by the Stokes .

where R is the sphere radius, η is the fluid viscosity and v is the relative speed sphere-fluid Different methods for measuring Stokes' force have been developed, involving It is, however, not easy to measure the force on a moving body [17].

### Jun 09, 2015 · The so-called Stokes’ hypothesis for a Newtonian fluid is reconsidered, and a possible explanation is given of the fact that, in spite of its evidently weak physical justification, it permits to obtain good results for the description of most compressible flows. The explanation stands upon a closer analysis of the effect of the terms of the complete stress tensor in which the viscosity

Viscosity of a liquid - Stoke's method (Procedure) : Class ... Find the least count and zero correction of the given screw guage. Find the diameter (d) of the ball using the screw gauge. Now, the radius(r) of ball can be calculated as ; r = d/2; Clean the glass jar and fill it with the viscous fluid. Place a meter scale vertically beside the jar. Measure the inner diameter of the jar using a vernier calipers. Stokes's law | physics | Britannica Equating the two expressions given above and solving for v therefore yields the required velocity, expressed by Stokes’s law as v = 2 / 9 (d 1 - d 2)gr 2 /η. Stokes’s law finds application in several areas, particularly with regard to the settling of sediment in fresh water and in … How to Measure Viscosity: 10 Steps (with Pictures) - wikiHow May 09, 2011 · How to Measure Viscosity. Viscosity can be defined as the measurement of a liquid's resistance to flow, also referred to as a liquid's internal friction. Consider water and molasses. Water flows relatively freely, while molasses is less

## Knowing the terminal velocity, the size and density of the sphere, and the density of the liquid, Stokes' law can be used to calculate the viscosity of the fluid.

Viscosity - Wikipedia The SI unit of kinematic viscosity is square meter per second (m 2 /s), whereas the CGS unit for kinematic viscosity is the stokes (St, or cm 2 ·s −1 = 0.0001 m 2 ·s −1), named after Sir George Gabriel Stokes. In U.S. usage, stoke is sometimes used as the singular form. The submultiple centistokes (cSt) is … MEASUREMENT OF VISCOSITY BY THE STOKES METHOD symbol for dynamic viscosity used by mechanical and chemical engineers — as well as fluid dynamicists — is the Greek letter mu (µ). Kinematic viscosity is the dynamic viscosity divided by the density (units m 2/s). Accepted values of the dynamic viscosity of some selected liquids and gases for temperature of 20ºC and pressure 1.10 5 Pa. To determine Coefficient of Viscosity of Water by ...

Use a falling-ball method to determine the viscosity of a liquid Practical activities have been safety checked but not trialled by CLEAPSS. Users may need to adapt the risk assessment information to local circumstances. Core practical 4: Use a falling-ball method to determine the viscosity of … An efficient numerical algorithm for solving viscosity ...