Wind Farm with Series Arrangement, ANSYS Fluent CFD Simulation Training

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The present problem simulates wind turbines with series arrangement in a wind farm using ANSYS Fluent software.

This product includes Geometry & Mesh file and a comprehensive Training Movie.

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Project Description

The present problem simulates wind turbines with series arrangement in a wind farm using ANSYS Fluent software. In this project, four wind turbines are designed in a row in a specific computational domain of ​​a large field called wind farm (turbine farm). A wind turbine is a piece of equipment in the category of turbomachines that uses wind kinetic energy to generate electricity; In this way, a strong wind current at high altitudes causes the turbine blades to rotate, and by rotating the central shaft of the turbine, an electric current is generated in the generator connected to the turbine body. The wind turbines studied in this project are horizontal axis wind turbines (HAWT); This means that the ambient wind flow is parallel with the turbine’s axis horizontally.

In general, horizontal axis wind turbines have higher performance efficiencies than vertical axis wind turbines and are built at much higher altitudes than vertical axis wind turbines. This project aims to simultaneously study the wind flow around the blades of these four wind turbines and the interaction of each of these turbines with each other. To simulate the rotational motion of turbines in this project, the frame motion method has been used; Thus, an independent area with a circular cross-section around the blades of each turbine is designed separately, and for the airflow in these areas, the rotational speed is defined. In fact, instead of applying a rotational speed to the turbine blades, this rotational speed is defined for the wind flow around the turbine blades. The rotational speed of each of these four wind turbines is 60 rpm and is defined around the central axis of the turbines (x-axis).

Project Description

It should be noted that the rotation-axis direction is the same for all turbines. However, the location of the rotation-axis origin is different because the location of the turbines is different from each other. Also, the wind flow in this computational area is equivalent to 1 m.s-1 and is defined horizontally.

Wind Farm Geometry & Mesh

The present model is designed in three dimensions using Design Modeler software. In this project, a computational domain has been designed for ambient wind flow, with a length of 240 m, a width of 30 m, and a height of 53 m. Within this computational area, four horizontal-axis wind turbines with three blades are designed. These turbines are located consecutively in the same direction and at a distance of 30 m from each other. To apply the frame motion model to define the rotational motion of the turbine, a distinct area is designed around these four turbines, which have a diameter of 18 m and a width of 3.1 m.

Wind Farm

We carry out the model’s meshing using ANSYS Meshing software. The mesh type is unstructured. The element number is 4154166. The following figure shows the Mesh.

Wind Farm

Wind Farm CFD Simulation

We consider several assumptions to simulate the present model:

  • We perform a pressure-based solver.
  • The simulation is steady.
  • The gravity effect on the fluid is ignored.

The following table represents a summary of the defining steps of the problem and its solution:

Viscous k-omega
k-omega model SST
Boundary conditions
Inlet Velocity Inlet
velocity magnitude 1 m.s-1
Outlet Pressure Outlet
gauge pressure 0 Pascal
(4 turbines)
wall motion stationary wall
wall motion stationary wall
Periodic (side faces)
periodic type translational
Symmetry (top face) Symmetry
Pressure-Velocity Coupling SIMPLE
pressure PRESTO
momentum first order upwind
turbulent kinetic energy first order upwind
specific dissipation rate first order upwind
Initialization methods Standard
gauge pressure 0 Pascal
x-velocity 1 m.s-1
y-velocity & z-velocity 0 m.s-1


At the end of the solution process, we obtain two-dimensional and three-dimensional contours related to velocity and pressure and two-dimensional and three-dimensional flow lines. The images show that the velocity and pressure gradients in the areas around the turbine blades become significant due to the contrast of the turbine rotational motion with the horizontal wind flow. Also, in all four turbines, the wind flow increases radially, and the highest speed appears near the tips of the turbine blades. The contours also state that the sequential arrangement of the four turbines has caused them to interact with each other in terms of wind speed.

You can obtain Geometry & Mesh file and a comprehensive Training Movie that presents how to solve the problem and extract all desired results.


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