CONTACT ANGLE MEASUREMENT BY POLYNOMIAL METHOD IN DROP SHAPE ANALYSIS
Keywords:
contact angle, sessile drop method, drop shape analysis, relative deviation.Abstract
There are analyzed the known methods of contact angle measuring by sessile drop shape analysis. The advantages and weaknesses of this methods and recommendations for their use are shown. The method of various degrees polynomial fitting curve of drop contour in the three-phase contact point is proposed for contact angle measuring. There is offered using of polynomial of 3rd – 6th orders on the basis of theoretical and experimental studies, investigating experimental contour with constant slope of tangent. There are calculated the relative deviation of actual values of contact angles determined by polynomials.
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References
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