レーザー誘起表面波法による粘性率および表面張力測定の研究 : 逆問題解析手法の開発(熱工学,内燃機関,動力など)

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Recently, in many fields of science and industry, there is the growing need for the measurement technique applicable to the process in which the viscosity drastically changes within a short period of time. In order to meet the need, we have developed a new viscometry based on the laser-induced capillary wave, which enables very short-time (μs〜ms) and small-sample volume (μL〜mL) measurement. In the present study, we have developed an analytical technique for solving inverse problem for the determination of viscosity and surface tension by curve fitting of detected signals to rather complex theoretical formulas. We have measured several Newtonian liquid samples whose viscosity ranges from 0.304〜7080mPa・s. The results agree well within about 10% from reference values in the wide range of viscosity.
2007-09-25