  Many microfluidics devices, coating processes or diphasic flows involve the
motion of a liquid meniscus on a wet wall. This motion induces a specific
viscous force, that exhibits a non-linear dependency in the meniscus velocity.
We propose a review of the theoretical and experimental work made on this
viscous force, for simple interfacial properties. The interface is indeed
assumed either perfectly compressible (mobile interface) or perfectly
incompressible (rigid interface). We show that, in the second case, the viscous
force exerted by the wall on the meniscus is a combination of two power laws,
scaling like $Ca^{1/3}$ and $Ca^{2/3}$, with $Ca$ the capillary number. We
provide a prediction for the stress exerted on a foam sliding on a wet solid
and compare it with experimental data, for the incompressible case.
