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Journal Article

Boundary slip as a result of a prewetting transition

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons47580

Andrienko,  D.
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons47820

Dünweg,  Burkhard
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons48921

Vinogradova,  Olga I.
MPI for Polymer Research, Max Planck Society;

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Citation

Andrienko, D., Dünweg, B., & Vinogradova, O. I. (2003). Boundary slip as a result of a prewetting transition. Journal of Chemical Physics, 119(24), 13106-13112.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000F-63D9-8
Abstract
Some fluids exhibit anomalously low friction when flowing against a certain solid wall. To recover the viscosity of a bulk fluid, slip at the wall is usually postulated. On a macroscopic level, a large slip length can be explained as a formation of a film of gas or phase-separated "lubricant" with lower viscosity between the fluid and the solid wall. Here we justify such an assumption in terms of a prewetting transition. In our model the thin-thick film transition together with the viscosity contrast gives rise to a large boundary slip. The calculated value of the slip length has a jump at the prewetting transition temperature which depends on the strength of the fluid-surface interaction (contact angle). Furthermore, the temperature dependence of the slip length is nonmonotonous. ©2003 American Institute of Physics.