Surface roughness and hydrodynamic boundary slip of a newtonian fluid in a completely wetting system.
The influence of surface roughness on the boundary condition for the flow of a Newtonian fluid near a hard wall has been investigated by measurement of the hydrodynamic drainage force. The degree of slip is found to increase with surface roughness. This leads to the conclusion that in most practical situations boundary slip takes place, leading to a reduction of the drainage force.
Max-Planck Institute for Polymer Research, 55128 Mainz, Germany.
Elmar
E
Bonaccurso
Hans-Jürgen
HJ
Butt
Vincent S J
VS
Craig