  In this paper, we revisit a model for the contact line problem which has been
proposed by Shikhmurzaev (1993). In the first part, in addition to rederiving
the model, we study in detail the assumptions required to obtain the isothermal
limit of the model. We also derive in this paper several lubrication
approximation models, based on Shikhmurzaev's approach. The first two
lubrication models describe thin film flow of incompressible fluids on solid
substrates, based on different orders of magnitude of the slip length
parameter. The third lubrication model describes a meniscus formation where a
wedge-shaped solid immerses in a thin film of fluid.
