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Transient CFD simulation of airflow around a 3–blade axial fan using mesh motion method

Fans almost have been used for air conditioning, ventilation of closed volumes, or heat transfer for industrial goals. Nowadays, airflow around fans have been investigated by engineers for obtaining the optimum operation efficiency. These fans are used in industrial ventilators, computer cases, and even domestic ceiling fans. In this simulation a Transient CFD simulation of airflow around a 3–blade axial fan using mesh motion method has been investigated.

In this analysis, it has been tried to Transient CFD simulation of airflow around a 3–blade axial fan using mesh motion method using the ANSYS Fluent software.

Geometry and grid

The fan geometry has been designed by Solid Work software and some amendments (drawing wind tunnel and fan cavity) has been done by Design Modeler software.

ANSYS Meshing software has been used for meshing applying face meshing method on fan blades including 3361069 elements, 6840784 faces, and 582445 nodes.



K-ε RNG has been used for this simulation because of accelerate in solving and better convergence in these kinds of simulations.

Boundary Condition

In this simulation, the flow input type is velocity inlet and the magnitude is 10m/s. the output flow type is pressure outlet and Gauge pressure is equal to 0. Wall boundary condition is no slip and moving wall.

Discretization of equations

According to the type of flow in this analysis, the SIMPLE algorithm is used to discretize the coupled velocity and pressure equations. The momentum equation has been discretized in the Second Order Upwind for more discretization accuracy.

The results are presented as velocity and pressure contours as well as streamlines.


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