I took a model of a standard CPU fan at blendswap by grooh – creative commons zero. Then loaded a screenshot into GIMP from Blender. There I removed the blades. Converted the white space to transparency and applied Gmic – Repair – Solidify filter.
It looked like that maybe the filled area could very well be a fan. A blade less fan. So inspired by this I made the new kind of Bladeless CPU Fan.
In the future I hope we can have a Gmic – Solidify and Heal Section Plugin that is 3D model vertex aware. So we could innovate directly in Blender.