The limit condition for the flow rate at the wall for a Newtonian fluid wit
h various solid/liquid interfaces was studied experimentally using an origi
nal high resolution technique. A notable interfacial slipping was shown for
the hexadecane flowing on a surface with low roughness and covered with me
thyl groups (non wetting surface for the hexadecane). The systematic study
of various modified surfaces made it possible to identify two key parameter
s fixing the amplitude of slipping at the wall and acting in an antagonisti
c way on the roughness of the surface (geometric and chemical) and the flui
d/surface interactions.