Particle Technology

centrifugal separation

Problems 8.6

Question 1.iii


So, why is the rate of motion radially in a centrifugal field not a constant, unlike when settling under gravity? Take a look at the following equations:


                equation       and            equation      

The acceleration in a centrifugal field is a function of radial position: with each new radial position there will be a new acceleration acting on the particle. Hence, we must integrate to find the total time taken for a particle to move from one radial position to another. In gravity the acceleration is constant and we do not need to integrate.


 
Note, 'g' is constant pretty much all over the Earth.

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