A method for modelling of BaSO4 precipitation in a double-feed semibatch stirred tank reactor is presented. Exact simulation of the process is performed by CFD in the feed zone whereas the other part of the tank is considered as a semibatch well-mixed reactor. The closure method for precipitation is also applied.
The deposition of aerosol fractal-like aggregates in a numerical model of the human nose was studied theoretically under steady-state breathing conditions. The object geometry was reconstructed using anatomical data and implemented numerically into the CFD code (FLUENT) that was used to calculate the three-dimensional airflow structure in the model. The Brownian dynamics algorithm was used to calculate the dynamic distribution of aggregates deposition.
Using the CFD method the numerical simulations of sedimentation processes in a rectangular settler were performed. A satisfactory agreement of experimental and numerical dependencies of the sediment distribution as a function of the settler depth was obtained.
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