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- W2315434757 abstract "This paper presents measurements of molecular mixing in turbulent buoyant jets of helium issuing into air, using planar laser imaging of the jet uid mole fraction elds. The o ws considered are nominally momentum-driven, so buoyancy eects are presumed to be conned to the small scales of the o w. The measurements focus on the developing region of the jet, which is of particular interest to o ws with combustion. The results suggest that buoyancy aects the details of the evolution of the mixing eld even while the mean eld maintains scaling properties consistent with non-buoyant jets. Specically , the mean jet uid mole fraction proles, and the proles of mole fraction uctuations, show a sharper jet/ambient uid interface relative to non-buoyant jets, possibly indicative of reduced entrainment. The mole fraction uctuations along the jet centerline are also weaker than those reported in non-buoyant jets. Statistics of jet uid mole fractions, conditional on spatial location within the jet, provide one view of the spatial evolution of the jet, while the eld nature of the measurements allows us to investigate the eect of spatial ltering, such as that inherent in large-eddy simulations (LES), on the elds of the turbulent uctuations. The results are intended to inform ongoing eorts to model the mixing process in o ws with density dierences, such as combustion systems." @default.
- W2315434757 created "2016-06-24" @default.
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- W2315434757 date "2007-01-08" @default.
- W2315434757 modified "2023-09-26" @default.
- W2315434757 title "Experimental Investigations of Mixing in Turbulent Jets with Buoyancy" @default.
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- W2315434757 doi "https://doi.org/10.2514/6.2007-1314" @default.
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