![]() The next layer is in contact with the moving layer since there is internal friction between the two layers, it also accelerates, and so on through the depth of the fluid. Kinematic Viscosity Definition : Symbol: Dynamic viscosity/density Dimensions: Units: v (nu) L2T x U.S.: ft2/sec SI: m2/s Kinematic viscosity is defined as. The layer of fluid in contact with the moving plate is accelerated and starts to move due to the internal friction between moving plate and the fluid. Example:- The above figure shows two adjacent fluid layers, out of them the lower layer is moving with a velocity of ‘u’ and the upper layer is moving with a relatively higher velocity of (u du). In the diagram, the fluid is initially at rest. Viscosity is the property of fluid by virtue of which any layer in fluid opposes the motion of its adjacent layers. The SI unit of viscosity is poiseiulle (PI). Fluids have zero shear strength, but the rate at which they are sheared is related to the same geometrical factors A and L as is shear deformation for solids. Viscosity is a measure of a fluid’s resistance to flow. The motion in the figure is like a continuous shearing motion. Care is taken to ensure that the flow is laminar, that is, the layers do not mix. ![]() Each successive layer from the top down exerts a force on the one below it, trying to drag it along, producing a continuous variation in speed from v to 0 as shown. Kinematic viscosity is a measure of a fluids internal resistance to flow under gravitational forces. When you stir a pot of honey the spoon generates the applied. ![]() The layer (or lamina) of fluid in contact with either plate does not move relative to the plate, so the top layer moves at speed v while the bottom layer remains at rest. A fluids viscosity is a measure of the fluids resistance to motion under an applied shear force. The bottom plate is held fixed, while the top plate is moved to the right, dragging fluid with it. The fluid to be measured is placed between two parallel plates. 1 Etymology 2 Definition Toggle Definition subsection 2.1 Dynamic viscosity 2.2 Kinematic viscosity 2. \) shows how viscosity is measured for a fluid.
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