What is Ostwald Viscometer?

VISCOMETER Ostwalda, also known as a viscosimeter, is a device used to measure fluid viscosity for one type of flow conditions. This viscosity of fluid represents fluid resistance to flow. This can be considered as fluid friction, often referred to as internal friction or thickness. The device uses a direct or reverse flow of test fluid over the U-shaped tube to measure the fluid viscosity. Ostwald viscomreter is determined by recording the time required to flow to a certain distance by means of a specific diameter tube. The side with a smaller tubing is referred to as a capillary. For the Viscomter of the Direct River, the bulb is located towards the top of the capillary side. On the side of the wider diameter, there is a slightly larger bulb towards the bottom.

are located two signs of a hose at a familiar distance apart. These marks are located above and below smaller bulb. In the return of the return flow, the bulb on the wider side is located above the bulb on the capillary side.

For measuring flow speed or Ostwald measurement, suction is used to draw liquid into a narrow tube until it comes above the top mark. The fluid then relaxes and the time it takes to pass the fluid between two points is measured. The Ostwald Viscometer flow is then used to calculate the viscosity of the fluid using the Poiseuille equation.

In addition to Ostwald Viscomer, several other viscometers are used. These include falling viscometers, falling piston viscometry, vibrating viscometry, rotating viscosier and bubble viscosters. Instead of measuring the movement of the fluid, some of these other types measure the mobility through the liquid, such as the falling ball, the falling piston or the rising air bubble. The use and accuracy of different types of viscceometers may vary.