Rate of Suspension Precipitation. The Cellular Model

For ensembles with large number of particles, it is practically impossible to realize the reflection method, and moreover, to construct pointwise exact solutions in a 

The choice of the boundary condition essentially determines the model of force interaction between the particle at the center of the cell and the other particles. A detailed comparative analysis of various boundary conditions was carried out in [450], where the solutions were obtained for the three above-mentioned versions under the assumption that the particle at the cell center was a drop of a liquid with different viscosity. A new variant of closed model was presented also in [450], where it was proposed to believe that the vortex intensity flux is equal to zero on the cell boundary. 

The steady-state velocities of the gravitational sedimentation in suspensions obtained with the help of cell models were compared with numerous experimental data in [450], It was shown that the most precise results can be obtained by using the Slobodov-Chepura model [450], in which the drag forces lead to formula (2.9.1), where the correction coefficient can be calculated as 

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