Rotating Disk Effect on Surrounding Airflow, Moving Wall

Description

Rotating Disk Effect on Surrounding Airflow CFD Simulation using Moving Wall, ANSYS Fluent Training

The present problem simulates a Rotating Disk Effect on Surrounding Airflow using ANSYS Fluent software. We perform this CFD project and investigate it by CFD analysis.

The present model is designed in three dimensions using Design Modeler software. The model’s geometry consists of a room measuring 0.5 m * 0.5 m * 1 m, in the middle of which there is a rotating disk 0.02 m thick and 0.1 m in diameter.

The meshing of this present model has been generated by Ansys Meshing software. The total cell number is 716870.

Methodology

The present problem simulates a rotating disk in a room using ANSYS Fluent software.

This work investigates the airflow behavior under the influence of the rotational motion of a rotating disk. In this simulation, airflow is in a computational domain (room), and a rotating disk with a certain rotational speed is placed in the middle of this room.

To define the rotational motion of a disk, the boundary condition of a moving wall with a speed of 5 rad/s must be used. Moreover, the laminar model is enabled to solve the fluid equations.

Conclusion

At the end of the solution process, we obtain two-dimensional and three-dimensional contours related to pressure, velocity, and velocity vectors. Since the disk output is a moving wall, the rotating disk has its maximum velocity at this output boundary.

By moving away from this boundary, the velocity decreases. As the velocity vectors show, the current under this rotation separates from the disk’s surface. Due to the low rotation speed of the disk, this separation is also slow.

As the velocity volume contour shows, the room air velocity has slightly increased in this area near the rotating disk. The pressure has also decreased. These results can be seen symmetrically on the back and the front of the disc.