Physics viscosity coursework

V B = 18 K B T π ρ p d p 3 {\displaystyle V_{B}={\sqrt {\frac {18K_{B}T}{\pi \rho _{p}{d_{p}}^{3}}}}}

The liquid will be moving from left to right due to the pressure difference between the ends of the tube. However because the friction between the fluid and the walls of the tube is greater than between two adjacent layers of liquid the liquid in the centre of the pipe will be travelling faster than that at the edges.

Imagine that the liquid is moving in layers, rather like the cards in a pack, and assume that no one layer crosses another layer. The frictional forces within the liquid act between one layer and another. Such motion is called laminar flow. The velocity of particles at a given distance from the centre of motion is constant. However if the layers do intermix we will get turbulent flow.

Physics viscosity coursework

physics viscosity coursework

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