Wikipedia
Prandtl is an impact crater on the far side of the Moon. It lies across the southeastern outer rim of the huge walled plain Planck.
This crater is roughly circular, but with an outward bulge to the south-southeast. The rim is worn but still retains a well-defined edge. Several small craterlets lie along the rim and inner wall, the most notable being a pair of small craters along the eastern side and a small, eroded crater intruding slightly along the south. The interior floor is generally level, with only a small rise to the south of the midpoint. There is a cluster of three small craterlets along the southern inner wall.
Usage examples of "prandtl".
Admiral Rozhdestvenski sailed his fleet halfway around the world to relieve Port Arthur, which put your present captor Enzian on the planet, it was the year the Germans all but wiped out the Hereros, which gave Enzian some peculiar ideas about survival, it was the year the American Food and Drug people took the cocaine out of Coca-Cola, which gave us an alcoholic and death-oriented generation of Yanks ideally equipped to fight WWII, and it was the year Ludwig Prandtl proposed the boundary layer, which really got aerodynamics into business and put you right here, right now.