Question: 2. In the class, we had the following example problem: Describe steady-state distribution of 1m diameter clay particles and 0.01m diameter clay particles in still


2. In the class, we had the following example problem: Describe steady-state distribution of 1m diameter clay particles and 0.01m diameter clay particles in still water. For each particle size, calculate the depth above the bottom of the water column at which the particle concentration is one-half the particle concentration in the water at the bottom. Assume kinematic viscosity of water of 0.013cm2/sec at 50F(10C) and solid particle density of 2.6g/cm3. [Diffusion coefficient in water for a 1m and 0.01m particle is 5109cm2/sec and 5107cm2/sec, respectively]. We worked through the case where particle diameter is 1m. Now calculate: c. the depth above the bottom of the water column at which the particle (diameter 100m ) concentration is one-half the particle concentration at the bottom (assuming diffusion coefficient in water for a 100m particle is 51011cm2/sec ) [10 points ] d. comparing particles with a diameter of 100m,1m, and 1nm, calculate 1) the fold change of their setting velocity and 2) the fold change of half-concentration depth (i.e. depth above the bottom where particle concentration is one half the particle concentration at the bottom). [10 points]
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