Flow electrification by cavity ED利用腔QED流带电.ppt

Flow electrification by cavity QED T. V. Prevenslik 11F, Greenburg Court Discovery Bay, Hong Kong Contents Historical background Contact electrification Purpose QED Theory Flow analysis Conclusions Historical background 1950 Streaming current ? Zeta potential induced by impurity ions 1980 Electrification ? density ionic charges as double layer at the wall interface 2001 Physiochemical corrosion-oxidation ... No evidence of corrosion products … Streaming currents ? shear stress Source never identified Contact electrification Cavity QED induced photoelectric effect Two-step model contact and separation Interface is a high frequency QED cavity that inhibits low frequency IR radiation from thermal kT energy inherent in atomic clusters. IR energy released concentrates to VUV levels in the surfaces of the metal and insulator Electrons are produced by the photoelectric effect. Purpose Extend the cavity QED induced photoelectric effect in the Two-step model of contact electrification to flow electrification. Theoretical background Piping system and laminar flow QED cavities in hydraulic oils Comparison of contact and flow electrification Available EM energy Photoelectric effect Piping system Hydraulic fluid is pumped in laminar flow through small diameter - long pipe Loop is closed as the fluid falls into an open receiving tank and pumped back to the supply plenum. Air enters the fluid in falling into receiving tank - usually through the pump . Laminar flow relations Laminar flow and QED Cavities Light and electron emission occurs over dimensions from walls less than 100 mm Light emission precedes electron emission - similar to photoelectric effect QED cavities in hydraulic oils Air clusters in flowing hydrocarbon liquids Tearing of oil during flow Tearing and QED electrification Source of EM energy Air clusters in hydraulic oil Oil Vapor bubbles