Contact line spring constant

It is interesting to compare the elasticity of a meniscus with another elasticity involved in wetting processes the CL spring constant. It was shown experimentally that the elasticity energy of a CL is not Hookean. By studying the relaxation of a CL deformed periodically, Ondarfuhu and Veyssie verified that this energy has a nonclassical expression given by  

This expression is different from the one derived for a meniscus (Eq. 9.9). However, it gives the same order of magnitude and includes the same dependence with ln(L/d) parameter, which again raises the issue of the transversal characteristic length to include in these expressions. The noticeable difference is given by the dependence in 6 that varies between Eq. 9.9 and Eq. 9.13. 

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