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hizen_14
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Homework Statement
Diffusion coefficient (D) of 100 nm particles ( density = 1050 kg/m3) in a viscous solvent at 25 C is 2.2 x 10-13 m3/s
What is the average shear rate at the particle surface?
Homework Equations
D = kT/ 6πηa (1)
where k is Boltzman constant, T = temperature, ηsusp = viscosity and a = radius
Pe = a2γ /D (2)
where γ = shear rate
The Attempt at a Solution
Assumed particles are in water
To find shear rate of particle surface I am not too sure that eq2 is the right equation to use or not. Can we assume that Pe = 1 ??
Pe = 1 means the solvent in the viscous state ?
Thank you
Zen