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Communication Dans Un Congrès Année : 2013

Numerical study of laminar starting plumes at high Schmidt number

Résumé

We consider an isothermal binary mixture of glycerol-water for Schmidt numbers around 6.10(4) - 6.10(5) filling a tank where a light binary mixture is injected in the center of the bottom wall. The propagation of an axisymmetrical buoyant-jet is modeled numerically for Grashof numbers in the range of 10(5) - 10(7) and injection Reynolds numbers in the range of 0:3-12. The studied configuration corresponds to the experimental set-up of [6]. In agreement with experimental data, the plume reaches a constant ascent velocity after a short initial period of acceleration. Two types of plume head are obtained numerically. Basically a good agreement with the experiment has been found concerning the ascent velocity value as well as the head shape (type and size). A modified scaling law of the ascent velocity versus a modified Reynolds number is proposed to take into account the difference of kinetic viscosity of both fluids.
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Dates et versions

hal-01848703 , version 1 (25-07-2018)

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  • HAL Id : hal-01848703 , version 1

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Huong-Lan Tran, Anne Sergent, Gilles Bernard-Michel, Patrick Le Quéré. Numerical study of laminar starting plumes at high Schmidt number. Congrès Français de Mécanique, Aug 2013, Bordeaux, France. ⟨hal-01848703⟩
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