Investigating Viscosity

Examination of viscosity target - We will examine how fluid temperature affects viscosity. Method ------ Equipment required ------------------ * Water bath * Thermometer * Measuring cylinder * Steel ball bearing * Micrometer * Balance * Honey (100 cm 3) * Stopwatch * Ruler Plan ----- * Measure the radius of the ball bearing and calculate its weight. * Find the quality of honey. Weigh the empty cylinder and place the honey in the same cylinder.

In order to find out how temperature influences the viscosity of honey, it is necessary to use a falling ball viscometer method. First, we perform a preliminary experiment to find the appropriate honey temperature range to let the ball fall . Archimedes said: 'When the human body is partially or completely immersed in the fluid, the upper thrust is equal to the weight of the fluid it replaces. When the ball bearing reaches the final speed, the force acting on the ball bearing balances and the ball bearing descends at a constant speed.

Depending on the application, kinematic viscosity is more convenient than absolute or dynamic viscosity. Kinematic viscosity is the absolute viscosity of a fluid divided by mass density. The magnitude of the kinematic viscosity is the area divided by time, the appropriate unit is square meters per second. A unit of kinematic viscosity in the centimeter - gram - second (CGS) system, known as Stokes in the UK and Stokes in the United States. British physicist Sir George Gabriel Stokes. Give your name. The stroke is defined as 1 square centimeter per second

Actually there are two quantities called viscosity. The amount as defined above, sometimes referred to as dynamic, absolute or simple viscosity to distinguish it from other amounts, is generally referred to as viscosity. Another quantity called kinematic viscosity (represented by the Greek letter ν "nu") is the ratio of the viscosity of the fluid to its density. Kinematic viscosity is a measure of the flow of fluid resistance under the influence of gravity. It is usually measured using a device called a capillary viscometer - a calibrated can with a basically thin tube. When two equal volumes of fluid are placed in the same capillary viscometer and allowed to flow under the influence of gravity, a more viscous fluid takes longer than a viscous fluid. Capillary viscometer is explained in detail later in this section.