Mesh Motion Method, Mixing Tank CFD Simulation ANSYS Fluent Tutorial

Description

Description

The present problem simulates the performance of a mixing tank by ANSYS Fluent software.

The closed mixing tank contains water liquid while the impeller starts rotating with 500 rev/min angular velocity, creating a massive vortex in the middle of the tank.

The geometry of the present model is three-dimensional and has been designed using Design Modeler software. We do the meshing of the present model by ANSYS Meshing software. The mesh type is unstructured, and the element number is 209,328.

This product is the 4th episode of the Turbomachinery Training Course.

Methodology: Mixing Tank CFD Simulation by Mesh Motion Method

The Mesh Motion method is enabled to model the rotational movement of the impeller. In this method, two different zones with interfaces between them should be created, and the rotating zone, which contains the impeller, would rotate independently of other stationary zones.

The solution is Unsteady, and the k- Ꜫ model is chosen to simulate the turbulence of the flow.

Conclusion

Since the main purpose of the issue is to investigate water movement inside a mixing tank, its related contours can be shown in the figures. Two-dimensional contours related to pressure, velocity, as well as turbulent intensity were obtained.

In the case of pressure, it is visible that the amount of water pressure in front of the impeller is much more than the amount behind it.

As was expected, the speed of the flow behind the impeller is more than in other areas in the domain. Also, the turbulent intensity parameter shows us the turbulence all over the tank.