液中におけるエタノール物質拡散係数と濃度依存性の評価

抄録

This study focuses on the concentration dependency of ethanol diffusion phenomenon. It is assumed that the flavor variation of whiskey related the variation of the molecular movement. In many cases of measuring the mass diffusion phenomena, it is assumed that mass diffusion coefficient is constant. However, in the case of the solution there is a concentration-dependent on diffusion coefficient such as an aqueous alcohol solution, measurement of a low concentration difference has been carried out. There is a need for measurement of a high concentration difference for simulating the movement phenomena of alcohol solution. In this study, transient diffusion field of ethanol aqueous solution system was visualized by an optical interferometer. In the results, it could be observed that the concentration dependence of the diffusion coefficient in the high concentration difference.