Slip and depletion in a Newtonian liquid

¹  Institute for Solid State Physics/EP IV, Ruhr University Bochum - 44780 Bochum, Germany, EU
²  Institute Laue-Langevin - BP 156, 38042 Grenoble, France, EU
³  NIST Center for Neutron Research, National Institute of Standards and Technology - Gaithersburg MD 20899, USA
⁴  Department of Materials Science and Engineering, University of Maryland - College Park, MD 20742, USA
⁵  Chair for Crystallography and Structural Physics, University of Erlangen - 91058 Erlangen, Germany, EU

Corresponding author: v-wolff@ill.eu

Received: 21 December 2007
Accepted: 18 March 2008

Abstract

Despite the fact that the magnitude of surface slip, which may occur for a liquid flowing past a solid wall, was quantified by different experimental techniques, the microscopic origin of this effect remains unclear. In the present article we present a neutron reflectivity study for a Newtonian liquid, hexadecane, in contact with solid walls at rest and under shear. In this system slip is not explained by a depleted liquid layer.