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Fig. 10

image

Maximum likelihood estimate â of the characteristic speed between solid particles. The particle size is τf = 0.003 and the solid concentration (Z = Σsolid/ Σtotal) is 0.074 for all the simulations. The procedure is to select particle pairs with separation less than D and compute â from Eq. (27). Extrapolating to D → 0 gives a rough estimate of the characteristic collision speed â0. The region in green corresponds to 0 ≤ â0 ≤ 2σa and the 1σ confidence interval for the slope.

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