TY - ADVS
T1 - Faraday, Jets, and Sand
AU - Sandtke, M.
AU - van der Meer, Roger M.
AU - Versluis, Michel
AU - Lohse, Detlef
PY - 2003
Y1 - 2003
N2 - When a 6-mm layer of fine sand with an average grain size of 40 µm is poured into a cylindrical container and shaken vertically, thin jets are seen to emerge from an airy cloud of grains, almost like protuberances from the corona of the sun. A quasi two-dimensional setup reveals the jet-formation process: The sand accumulates in ripples, and below each of them air is entrained by the convective motion of the grains. Air bubbles form at the bottom and slowly rise through the sand. Every time a bubble reaches the surface, it creates a void, which thereupon collapses and focuses into a jet. Gallery of Fluid Motion Award-winning entry 2003
AB - When a 6-mm layer of fine sand with an average grain size of 40 µm is poured into a cylindrical container and shaken vertically, thin jets are seen to emerge from an airy cloud of grains, almost like protuberances from the corona of the sun. A quasi two-dimensional setup reveals the jet-formation process: The sand accumulates in ripples, and below each of them air is entrained by the convective motion of the grains. Air bubbles form at the bottom and slowly rise through the sand. Every time a bubble reaches the surface, it creates a void, which thereupon collapses and focuses into a jet. Gallery of Fluid Motion Award-winning entry 2003
KW - IR-57536
M3 - Digital or Visual Products
ER -