Image: John Hart, Centre for Sports Engineering Research Sheffield Hallam University
This image of a cyclist on a triathlon bike is a visualisation of the CFD calculations. Yellow and white areas on the cyclist and bike show regions that have the highest drag. The cyclist himself accounts for 72 per cent of the drag force, with his legs generating most of that. The frame and forks account for 5.7 per cent, and the gearing 5.2 per cent. Water bottles are lumpy and generate 4.5 per cent of the drag. External cabling makes up 3.8 per cent, which makes a strong argument for tucking it inside the frame. As for the ribbons streaming behind, the white lines indicate high-velocity airflow and the pink-blue lines indicate slow-moving regions.
I was talking about this image with my friends on a ride recently so I figure I will reTumble it for reference.
Cool Koi (at Winterthur Museum, Garden and Library)
I had to let Stefanwolf out into the backyard before I left this morning (a bit before 6 am). Growling and barking ensued. Dang, I’m still in my socks. After getting him back inside this poor thing was still stuck on top of the woodpile, scared stiff. #opossum North America’s only native marsupial.