Turbulent mixing particle settling velocity

Now, let us assume that die water body is kept well mixed by turbulent fluid motion in the tank (Fig. 23.2b). The vertical motion of a particle is now given by the algebraic sum of the local vertical current velocity vz and the settling velocity vs vz tot = vs + vz. The total particle flux, E Fs, across an interface at an arbitrary depth z0 is given by the integral of Eq. 23-12 over the area Am whereby vs is replaced by the total vertical particle velocity, vz tot ... 

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