Drainage theoretical developments

The simplest model was a theoretical version of the collapsing film wedge. As discussed previously (Section 5.3.3.1), the collapsing wedge geometry was imposed on the analysis of the experimental data to generate instantaneous film drainage rates. Therefore, it seemed reasonable to use this same shape in the development of the first theoretical model [51]. This led to the condition that the shape of the film was invariant with... 

The theoretical and numerical model for vertical liquid film drainage that has been developed reproduces a number of features described in these experiments. These features include film shapes and thinning rates. 

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