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It is not necessary to have strong background in wind power technology to follow this tutorial since it's main its main function is to demonstrate how to perform an FSI simulation in ANSYS. However, having a basic understanding of wind turbine blade design and aerodynamics is suggested. It would be a good idea to know why blades are twisted for example. The following video starts with a brief statement on how blades are oriented but it might be difficult to understand if you have never been exposed to this material. I found two good brief introductions on wind turbine blade design and I strongly suggest you spend a few minutes learning the basics of this fascinating topic. 

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Schubel, P., & Crossley, R. (2012). Wind Turbine Blade Design Review.  Wind Engineering,  365-388. (A more thorough introduction if you are interesting interested in learning a bit more about this topic)

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In the following video, we close off all opening then make a solid body to represent the volume of enclosed by the blade, out of the current surface bodies. 

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1. Upwind sketch
   1. Select xy coord, new plane, offset z of 90m, generate
   2. New Sketch
   3. Make sure auto constraints cursor is selected
   4. Use arc by center tool
   5. Use line tool
   6. Dimensions angles to 60 degree each
   7. Dimension radius to 120 meters
2. Downwind sketch
   1. Same thing but place it 180 meters behind
   2. twice the radius, so 240 meters
3. Skin
   1. Click skin, select both sketches
   2. Specify add material
4. Name this body, fluid, and specify that it’s a fluid

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Creating the Fluid Volume

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Summary of steps in the above video:       

1. Skin
   1. Click skin, select both sketches
   2. Specify add material
2. Name this body, fluid, and specify that it’s a fluid
3. Boolean subtract
   1. Click Boolean, select target body to be the fluid body and tool body to be the blade
4. Show the blade inside with wireframe view

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