上昇球形ガス気泡の気液界面吸着過程に関する研究 : 第1報,定常状態における界面活性剤の表面濃度に関する数値計算(流体工学,流体機械)

概要

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To estimate the total amount of adsorbed surfactants onto the surface of a single rising bubble, the Navier-Stokes equation, the convection-diffusion and the surface-diffusion equations of the surfactants were numerically solved at the steady state and the effects of the Reynolds number (Re) and the bulk concentration of the surfactants on the surface concentration distribution were investigated. The results reveal that the surface concentration of the surfactants at the top of the bubble is lower than that at the bottom and the difference between them increases as the Re increases or the bulk concentration of the surfactants decreases. The critical Re (Re_c) can be estimated for the bubble to behave as a solid particle and the averaged concentration of surfactants coincide with the equilibrium concentration corresponding to a zero net adsorption-desorption flux for Re<Re_c.
社団法人日本機械学会の論文
2003-02-25