Abstract
The Marangoni wave theory is reviewed and extended to the short gravity water wave regime. This theoretical approach is verified by wave damping measurements in the Hamburg wind-wave tunnel performed in the presence of monomolecular hexadecanoic acid methyl ester, (Z)-9-octadecen-1-ol, and hexadecyltrimethylammonium bromide surface films. A good agreement of the theoretical with the experimental results is obtained, when performing the calculations with the help of dilational modulus and phase angle values, which were obtained from dynamic surface potential measurements over a wavy water surface (H. Hühnerfuss, P. A. Lange, and W. Walter, J. Colloid Interface Sci. 108, 430, 1985). Dilational modulus values determined by classical Langmuir-trough measurements are not suitable for determining wave damping ratios and give rise to too large values.
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