ナショナルジオグラフィックさんのインスタグラム写真 - (ナショナルジオグラフィックInstagram)「Photo by Paolo Woods and Gabriele Galimberti @paolowoods and @gabrielegalimbertiphoto I Gary S. Settles is a mechanical and nuclear engineer and distinguished professor emeritus at Penn State University in Pennsylvania. He has conducted extensive research on fluid dynamics and flow visualization, and has become a specialist of Schlieren. Schlieren is a process that uses a curved mirror to visualize the flow of air and fluids of varying density. Invented by the German physicist August Toepler in 1864, it is widely used in aeronautical engineering to photograph the flow of air around objects. In this case, he's demonstrating the turbulence caused by hot air from a candle in his lab in State College. This effect is not visible to the naked eye, but Leonardo da Vinci understood that turbulence in the air is similar to turbulence in fluids, a concept that he had intensely studied and that deeply obsessed him. Check our story in @natgeo for more on #leonardodavinci #leonardo #davinci #schlieren #air」5月24日 9時34分