# Horizontal Axis Wind Turbine (HAWT) CFD Simulation by MRF Method, ANSYS Fluent Tutorial

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• The problem numerically simulates the Horizontal Axis Wind Turbine (HAWT) using ANSYS FluentÂ software.
• We design the 3-D model by theÂ Design ModelerÂ and create the mesh usingÂ ANSYS MeshingÂ software.
• The element number equals 2,696,011.
• TheÂ MRF option (Frame Motion) is enabled to define the rotational motion of the wind turbine.
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## Description

The present problem simulates the air around a Horizontal Axis Wind Turbine (HAWT) by ANSYS Fluent software. In the present case, it is assumed that the wind turbine is rotating with a rotational velocity of 72 rad/sec while the air is blowing at the speed of 15 m/s.

This simulation shows how the air treats around the blades of the wind turbine by presenting different solution parameters.

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 2,696,011.

## Methodology: Horizontal Axis Wind Turbine (HAWT)

The Multiple Reference Frames (MRF) method is enabled to model the rotational movement of the wind turbine. The solution is independent of Time (Steady State), and SST K-Omega is chosen for the turbulence model.

## Conclusion

Since the main purpose of the issue is to investigate air movement around a Horizontal Axis Wind Turbine, 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 air pressure increases with distance from the hub. Also, It is true for the turbulent intensity parameter.

The speed of the turbine blades rises by moving away from the hub, as do the vorticities formed behind them.

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