How to determine viscosity. Calculate the viscosity of the liquid from the data you have collected. Viscosity is the measure of a fluids resistance to flow molasses is highly viscous. Taking the measurement watch the stream of fluid closely for the first break.
Kinematic viscosity v ip kgms x 10 3 kgm3 m2s x 10 6. If you want determine viscosity in a liquid try a simple science experiment by measuring the speed of a metal ball dropped in a container of liquid. These van der waals forces are critical facets of a samples resistance to deformation or flow which defines the materials viscosity.
The velocity of the ball combined with the relative densities of the ball and the liquid can be used to calculate the viscosity of liquids. The viscous properties of a liquid or amorphous solid are primarily determined by inter particle forces within the solution including friction and attraction between molecules in the macrostructure. Viscosity 2 x ball density liquid density x g x a2 9 x v where g acceleration due to gravity 98 ms2 a radius of ball bearing v velocity of ball bearing through liquid.
Place the bottom of the ruler at the bottom. Measuring viscosity is easy. The shear resistance in a fluid is caused by inter molecular friction exerted when layers of fluid attempt to slide by one another.
That means it is 30 times more viscous than water. Measure the distance between the top and bottom marks. 5 ways to measure viscosity.
Measuring viscosity dates back to as early as the 19th century. The intersection with the y axis gives the zero shear intrinsic viscosity figure 6. The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress.
Draw a second mark about 25 centimeter 1 in 1 in from the bottom of the graduated cylinder. Density p kgm3. For instance if your average flow rate for water was 20 seconds and corn oil took 600 seconds 5 minutes to flow out of the viscometer than the viscosity index for corn oil is 30.
Viscosity and density imperial units in the imperial system of units the pound lb is the standard unit of weight a cubic foot is the standard unit of volume and the second is the standard unit of time. The viscosity values obtained are then extrapolated. Dip the viscosity cup below the surface and lift straight up.
To Determine The Coefficient Of Viscosity Of A Given Viscous Liquid By Measuring Terminal Velocity Of A Given Spherical Body Msr Blog
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