Explaining a fastball's unexpected twist

An unexpected twist from a four-seam or a two-seam fastball can make the difference in a baseball team winning or losing the World Series. However, "some explanations regarding the different pitches are flat-out wrong," said ...

Shaken, and stirred: Scaling up bioreactors' fluid dynamics

Bioreactors are widely used to produce different therapeutics in the biopharmaceutical and regenerative medicine industries. Drug development relies on small multi-well plates shaken around an orbital diameter, while production-scale ...

Gazing into the flames of ionic winds

New 3-D visualizations that reveal how flames respond to electric fields could help improve combustion efficiency and reduce pollution.

Winging it: How do bats out-maneuver their prey?

Bats catch food 'on the wing' without touching the ground, but how do they do it? A new study by Per Henningsson at Lund University, Sweden is the first of its kind to analyse the aerodynamics of bats performing manoeuvers ...

Image: A laser-sharp view of blended wing body plane design

Engineers at NASA's Langley Research Center in Hampton, Virginia, used lasers inside the 14- by 22-Foot Subsonic Tunnel to map how air flows over a Boeing Blended Wing Body (BWB) model – a greener, quieter airplane design ...

Rivers flow differently over gravel beds, study finds

River beds, where flowing water meets silt, sand and gravel, are critical ecological zones. Yet how water flows in a river with a gravel bed is very different from the traditional model of a sandy river bed, according to ...

Dolphin-power sufficient for propulsion without tricks

For 60 years the world has believed that dolphins did not have enough muscle to propel them at high speed and that they were resorting to some fluid-flow trickery to pull off their impressive performance. But Frank Fish from ...

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