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- W2129014771 abstract "The present paper is concerned with the coupling between the velocity and scalar fields (temperature or gas mass fraction) in variable-density turbulent axisymmetric jets, both through experimental and numerical approaches. Some results for mixed moments are obtained in the near-field (x/Dj<20) of these jets with a new measurement technique combining hot or cold-wire and laser Doppler velocimetry (LDV). A triple moment model, based on Deardoff's work [1] is developed for the far-field of a helium jet (x/Dj>90). These results are compared with the experimental and numerical study of Panchapakesan and Lumley [2] in the far-field of a helium jet. The results confirm that the mixing is more efficient and rapid when the density of the central jet is low. Numerical results show that the present model may be improved by taking into account pressure and dissipation terms for prediction of configurations with small density fluctuations. Regardless, for strong density fluctuations, some new modelling propositions are needed for better predictions." @default.
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- W2129014771 date "2001-11-01" @default.
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- W2129014771 title "Scalar triple moments in variable-density turbulent jets: experiment and model" @default.
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- W2129014771 doi "https://doi.org/10.1016/s0894-1777(01)00076-0" @default.
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