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Glow with the Flow

Glow With The Flow: Researchers at NASA's Langley Research Center in Hampton, Va., use all sorts of tools and techniques. Engineers led by researcher Greg Gatlin have sprayed fluorescent oil on a 5.8 percent scale model of a futuristic hybrid wing body during tests in the14 by-22-Foot Subsonic Wind Tunnel. The oil helps researchers "see" the flow patterns when air passes over and around the model. Those patterns are important in determining crucial aircraft characteristics such as lift and…

Photogram #61 - analogue images of the refraction patterns of a beam of light passing through various glass objects. The image is captured directly on to 35mm film, no camera lens is used ( this is a photogram using film instead of photographic paper). No digital editing.

A Jamaican fruit bat in flight. Brown University researchers found that #bats appear to use a network of hair-thin muscles embedded in the membrane of their wing skin to adjust the wings' stiffness and curvature while they fly. [Credit: Jorn Cheney, Swartz/Breuer Lab, Brown University]

The Weird and Beautiful World of Fluid Dynamics

Inverted Drafting Inverted drafting happens when a leading object encounters less drag than the object behind it. An example is when flows encounter passive objects, like flags, arranged one behind the other. Flags are considered passive because they flop around with every shifting breeze, unlike humans who are considered rigid objects. In this image, two white, S-shaped lines are flags oriented one behind the other. The flag in the follower position cuts into the wake given off by the…