液相混合層での乱流混合反応に及ぼす温度成層の効果(流体工学,流体機械)

概要

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The effects of thermal stratifications on turbulent mixing and chemical reaction in the liquid mixing layer were investigated by both laboratory experiments and numerical simulations. The experiments were conducted in neutrally, unstably and stably stratified water flows with a rapid chemical reaction. Instantaneous velocities and concentration were simultaneously measured using a combined technique with a two component laser-Doppler velocimeter (LDV) and a later-induced fluorescence (LIF) method. Turbulence quantities such as the mean concentration of chemical product and turbulent mass fluxes were estimated and the effects of thermal stratifications on the quantities were clarified. Further, the large-eddy simulation (LES) using the large-eddy probability-density function (LEPDF) model as a SGS model was applied to the thermally-stratified reacting liquid flows. The results show that the effects of the stratifications on the turbulent mixing and chemical reaction can be well explained by the LES.
2003-03-25