Numerous methodologies have been developed for the
State-of-the-art axisymmetric drop shape analysis (ADSA) measurement of interfacial tensions and contact angles, techniques for the computation of interfacial tensions and contact as outlined in Refs. ( 8,9 ) . Of these, axisymmetric drop angles by fitting the Laplace equation of capillarity to the shape shape analysis ( ADSA ) methods are considered to be the and dimensions of pendant and sessile drops are presented. More most powerful because of their accuracy, simplicity, and accurate, efficient, and reliable versions of the technique for the versatility ( 3, 10 ) . They are also very suitable for automeasurement of contact angles from the volume and diameter of mated computer implementation by means of digital imsessile drops [axisymmetric drop shape analysis-diameter age analysis ( 2 ) .
(ADSA-D)] and for interfacial tension measurements from a series of arbitrary profile coordinates of sessile and pendant drops
ADSA methods are based on the numerical fit between [axisymmetric drop shape analysis-profile (ADSA-P)] have the shape of experimental drops (or bubbles) and the mathebeen developed. Advanced numerical methods have been used to matical model given by the classical Laplace equation of improve the numerical stability and global convergence, for more capillarity. They are applicable to pendant and sessile drops accurate results and a wider range of applicability of the methods. in a very wide range of surface tensions, for any fluid-liquid A new technique called axisymmetric drop shape analysis-height system that can be represented by the Laplace equation of and diameter (ADSA-HD) has been developed to estimate interfacapillarity. Early efforts in the analysis of axisymmetric cial tensions from the height and diameter of sessile and pendant drops to determine surface tensions were those of Bashforth drops. Numerical simulations using numerically generated drop and Adams (11) and Maze and Burnet (12), who developed profiles were used to evaluate the accuracy and applicability of the numerical strategy on which modern methods are based, the methods.