Mixer Tank CFD Simulation, ANSYS Fluent Training

Description

The present problem simulates the Mixer Tank by ANSYS Fluent software. We perform this CFD project and investigate it by CFD analysis.

In industry, mixing is an operation that involves the manipulation of heterogeneous materials with the intent to make them more homogeneous. Industrial Mixer is a machine that blends, homogenizes, and mixes different materials into a single substance.

Mixers combine virtually any solid or liquid necessary to form the final product. Mixing is performed to allow heat and mass transfer to occur between one or more components or phases. Modern industrial processing almost always involves mixing as it is needed during manufacturing or processing.

Their powerful motors and blades allow mixers to work with various materials. These machines are widely used across many industries, including pharmaceutical, chemical, agriculture, food, and beverage.

In this project, a mixer tank is modeled, and the effect of its rotating impeller on the mixing procedure is investigated. In this tank, we consider mixxing 3 phases. Water flow and salt inlet have a mass flow rate of 0.6 kg/s.

The geometry is designed in ANSYS Design Modeler and meshed by ANSYS Meshing. The mesh type used for this geometry is unstructured, and the total element number is 152641.

Mixer Methodology

This simulation has been done in 3 phases: air, water, and salt. So, the simulation uses the VOF multiphase model for the three phases of air, water, and salt. MRF model is also used to model the rotation of the impeller.

The rotational speed of this tank is equal to 10 rpm.

Mixer Conclusion

The contours of mixture density, velocity, phase ID, and volume fractions of water, air, and salt are obtained. As it is clear from the contours, due to the impeller’s rotation, the tank’s three-phase mixing phenomenon has occurred.