As an Iranian, this is the first time I hear about these windmills! Unfortunately, the only source of info about them is this National Geography video. There is no exclusive page for them on wikipedia, but I could find how they work generally here: https://en.m.wikipedia.org/wiki/Panemone_windmill
That wiki page suggests that the sails are articulated? In the video these are very much fixed sails - looks like battens of woods lashed or nailed together so I don't think the sails themselves can turn. I do wonder which way the prevailing wind is for those windmills though as they are surrounded by walls. The knee jerk reaction is that the wind comes "face on" but then surely there would not be a turning force if…
They look surprisingly similar to a modern vertical axis wind turbine, although without the "lift" shape to the blades.