The centre of the polar vortex (white dot) is displaced from the South Pole (white cross). Credit: ESA/VIRTIS-VenusX/INAF-IASF/LESIA-Obs. Paris/Univ. Lisbon/Univ ...
Previously too complex to tackle, computer simulations can now show how elliptical vortex rings form, say scientists. Understanding how smoke rings form and dissipate could lead to technology allowing ...
Researchers have found that a structure with a twisted, helical shape and an elliptical cross section -- inspired by the stem of a daffodil -- can reduce drag and eliminate side-force fluctuations. In ...
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