A Numerical Method for Determining Surface Tension of Sessile Drop

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J. Korean Ceram. Soc. > Volume 33(12); 1996 > Article

Journal of the Korean Ceramic Society 1996;33(12): 1325.

Sessile Drop의 형상으로부터 수치계산에 의한 표면장력 측정

정영수, Takayoshi Iseki¹

가야대학교 공학부
¹동경공업대학 무기재료공학과

A Numerical Method for Determining Surface Tension of Sessile Drop

ABSTRACT

A new numerical method for determining the surface tension of a liquid drop by experimental measurement of the contour of the sessile drop is explained. in the present method a very simple and short computer program enables the calculation of surface tension in a few seconds even by a low speed personal computer. It need not the use of any other numerical tables or complex techniques. X and Z-corrdinates at one point on the contour of a sessile drop and the tangential angle at that point are all the data needed when the density of the drop is known. The results were compared with the values derived by a conventional method. This method can be used for the confirmation of measuring accuracy. Also the same concepts can be applied for the pendant drop method by changing only the sign of Z-coordinate from "+" to "-"ot; to "-"ot;-"quot;

Key words: Numerical method, Surface tension, Liquid drop, Sessile drop, Computer program, Pendant drop