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(PhysOrg.com) -- Metamaterials researchers Yaroslav Urzhumov and David Smith, working at Duke University have built a simulation of an object that can move through water without leaving a trace and claim it's a concept that could be built and used in the real world provided more research is done. In their paper, published on arXiv, the two describe how they programmed the use of metamaterials applied to an object, along with tiny water pumps, into a model to simulate an actual object moving through water without dragging some of the water with it that would normally cause turbulence.

(PhysOrg.com) -- A Swinburne University professor was part of a team that showed that drag on hot bodies moving through liquid can be radically reduced by up to 85 per cent, potentially doubling their speed.