Abstract
The internal gravity waves and the turbulent wake of a sphere moving through stratified fluid were studied by the fluorescent dye technique. The Reynolds number Re=U·2a/v was kept nearly constant at about 3 · 103 and the Froude number F;U/a N ranged from 0.5 to 12.5. It is observed that waves generated by the body are dominant only when F<4 and are replaced by waves generated by the large scale coherent structures of the wake when F>4.
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Hopfinger, E.J., Flor, J.B., Chomaz, J.M. et al. Internal waves generated by a moving sphere and its wake in a stratified fluid. Experiments in Fluids 11, 255–261 (1991). https://doi.org/10.1007/BF00192753
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DOI: https://doi.org/10.1007/BF00192753