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• W2890175679 abstract "In the present paper we study buoyant (plume) and non-buoyant (jet) fluid injection in a neutrally stratified uniform cross-flow. Both cases are of practical importance in environmental fluid mechanics. The study is carried out numerically, using highly resolved large-eddy simulation in conjunction with the Lagrangian dynamic sub-grid scale model for both momentum and scalar transport equations. The velocity ratio is $$kappa =8$$ . In the plume case, the Froude number is $$F=10$$ , such to allow the use of the Boussinesq approximation. The simulations are successfully validated against experimental data and well established semi-empirical relations. The study shows the existence of three different regions as regards the plume evolution, each of them characterised by different peculiarities: in momentum-buoyancy region the plume exhibits an almost steady cylindrical shape with relative small turbulence structures; in deflection region the plume is deviated horizontally and a high shear rate is detected; in entrainment region the vortex pair develops, along with the sausage-like turbulent structure. The comparison between the plume and the jet case shows that the latter has a higher eccentricity while its trajectory height is sensibly lower. Also, the sausage-like structures are not present. Finally, an empirical formula for the jet trajectory is given, although its full validation will require additional studies." @default.
• W2890175679 created "2018-09-27" @default.
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• W2890175679 date "2018-09-14" @default.
• W2890175679 modified "2023-09-26" @default.
• W2890175679 title "Turbulent structures of buoyant jet in cross-flow studied through large-eddy simulation" @default.
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• W2890175679 doi "https://doi.org/10.1007/s10652-018-9629-1" @default.
• W2890175679 hasPublicationYear "2018" @default.
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