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Analysis of Mixing Tank

​Experience the fascinating world of industrial mixing through the Analysis of Mixing Tank project. Discover the intricate details of tank design and uncover the effects of different impeller configurations on mixing efficiency. This project offers insights into enhanced processes and elevated product quality. For a detailed report, click the button below and join us on the journey of unraveling the secrets of optimal mixing!

In this project, CFD approach is taken into consideration which requires more computational resources
to solve when compared to various experimental methods, but it gives more accurate solutions. In this
project, a CFD methodology to simulate flow fields is developed and used in six tank-stirrer geometries.
For the correct modelling of the flow fields, the realizable k-epsilon turbulence model is used, offering
good results. The methodology uses the MRF approach to calculate a first initial solution, used
afterwards to run a transient case. This combination of approaches allows a fast and accurate result, able
to capture existing periodicities in the flow. To use this method, the domain of the tank is divided in
two, a stationary and a spinning region. This project has shown how an incorrect definition of regions
leads to unphysical results. It has been concluded that a good practice is to keep the spinning region
close to the impeller, where there is substantial flow movement.


The selected turbulence model has worked correctly in both tank-stirrer combinations. With the help of
mesh sensitivity analysis, we got a good mesh count with the help of which there was not a lot of
difference from the expected solution. This project has also shown the effect of using different impeller
and tank configuration. The optimal results can be found in the configuration where the radial impeller
is used along with baffled configuration. But if an application requires an unbaffled configuration to be
used it is better to use a propeller impeller. The effect of different angles for Inclined impellers was also
studied. And it can be found that the angle has a significant effect on the mixing time. Even the effect
of various shaft clearance was studied. It can be summarized that the shaft clearance should be kept
around 0.33 to 0.142 times of the tank height to get an optimal solution. Furthermore, the experimentally
measured mixing time was compared with the simulated time using CFD simulation, showing a good
correlation between CFD predictions and measured times.

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