Keyword: fluidmechanics

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  • Proposed Cloaking Device for Water Waves Could Protect Ships at Sea

    03/03/2012 10:58:25 PM PST · by neverdem · 16 replies
    ScienceNOW ^ | 2 March 2012 | Adrian Cho
    Enlarge Image Underpass. Appropriately sculpted ripples on the ocean floor could convert surface waves into internal interfacial waves, allowing them to pass under a floating object and protecting the thing from jostling. Credit: M.-R. Alam, PhysRevLett, 108 (24 February, 2012) The weird science of invisibility has entered uncharted waters. By altering the sea floor in just the right way, it should be possible to hide an object floating on the sea from passing waves, a fluid mechanician predicts. The technique might help to protect ships and floating structures from rough seas. And because the scheme works entirely differently from...
  • Atom Smasher Yields 'Perfect Fluid'

    04/19/2005 2:26:32 PM PDT · by neverdem · 65 replies · 1,820+ views
    LA Times ^ | April 19, 2005 | Thomas H. Maugh II
    The unexpected finding could provide insight into the creation of the universe, scientists say. Researchers smashing gold atoms together to mimic conditions in the first microseconds after the creation of the universe have observed an unexpected new state of matter. Instead of the thin, fiery gas of quarks and gluons that they expected, they found instead a dense drop of the elementary particles that behaves like a hitherto unseen "perfect fluid." It is "a truly stunning finding," said Raymond L. Orbach, director of the Department of Energy's Office of Science. Quarks are the fundamental building blocks of protons, neutrons and...