saying for remembering a viscosity meaning

#Saying for remembering a viscosity meaning download

Fluid in contact with the moving plate and which is on the side of the nearer plate is moving with maximum velocity.That layer which is in contact with the moving plate and is on the side of the farther plate is moving with maximum velocity.The layer of the fluid, which is in contact with the moving plate, has the maximum velocity.Fluid layer with the maximum velocity lies midway between the plates.If the plate moves with a constant speed of 1 m s − 1, then: A thin plate of surface area 0.01 m 2 is moved parallel to the length of the plate such that the plate is at a distance of 2 m from one of the plates and 4 c m from the other. Q: The space between two large horizontal metal plates 6 c m apart, is filled with a liquid of viscosity 0.8 N / m. Therefore we may write, η = N m -2 or Pasġ Poise = 1 g cm -1s -1 = 0.1 kg m -1 s -1 Solved Examples For You Therefore we may write: η = dynes cm -2 sec or the units of viscosity are dynes sec cm -2.

#Saying for remembering a viscosity meaning download

You can download Mechanical Properties of Fluids Cheat Sheet by clicking on the download button belowīrowse more Topics under Mechanical Properties Of Fluids Hence the coefficient of viscosity may be defined as the force of friction required to maintain a velocity difference of 1 cm/sec between two parallel layers, 1 cm apart and each having an area of 1 sq cm. If dx =1, A = 1 sq cm dv = 1 cm/sec, then f = η. Where η is a constant known as the coefficient of viscosity and dv/dx is called velocity gradient. The force of friction f between two layers each having area A sq cm, separated by a distance dx cm, and having a velocity difference of dv cm/sec, is given by: Viscosity is the force of friction which one part of the liquid offers to another part of the liquid. In other words, every layer offers some resistance or friction to the layer immediately below it. As we move from the centre towards the walls, the velocity of the layers keeps on decreasing. It is a type of flow with a regular gradation of velocity in going from one layer to the next. As we move from the wall towards the centre of the tube, the velocity of the cylindrical layers keeps on increasing till it is maximum at the centre. The layers which are in contact with the walls of the tube are almost stationary.

Imagine the liquid to be made up of a large number of thin cylindrical coaxial layers. All parts of the liquids do not move through the tube with the same velocity. Hence, they are less viscous or have low viscosity.Ĭonsider a liquid flowing through a narrow tube. This is because of the weak intermolecular forces.

The liquids which flow rapidly have a low internal resistance. Therefore, these liquids are more viscous and have high viscosity. This is because of the strong intermolecular forces. The liquids which flow slowly, have high internal resistance. It is the internal resistance to flow possessed by a liquid.