Two aqueous streams containing salt at differing concentrations flow continuously into a well mixed tank and a mixed product stream is removed. In this case the densities of the streams are not assumed constant but vary as a function of concentration. All three streams can have time varying flow rates, and hence the concentration and volume of liquid in the tank will also vary with time. The above system is treated in detail by Russel and Denn (1972), and an analytical solution is obtained.
Assumptions
The tank is assumed to be a well mixed tank.
The density of salt solution is assumed to vary linearly with concentration.
References: J. Ingham, I.J. Dunn, E. Heinzle & J.E. Prenosil, Chemical Engineering Dynamics : Modelling with PC Simulation, VCH Publishers Inc., New York (USA).
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