Surface roughness and hydrodynamic boundary conditions

Vinogradova, Olga I. and Yakubov, Gleb E. (2006) Surface roughness and hydrodynamic boundary conditions. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 73 4: 045302-1-045302-4. doi:10.1103/PhysRevE.73.045302

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Author Vinogradova, Olga I.
Yakubov, Gleb E.
Title Surface roughness and hydrodynamic boundary conditions
Journal name Physical Review E - Statistical, Nonlinear, and Soft Matter Physics   Check publisher's open access policy
ISSN 1539-3755
Publication date 2006-04-27
Sub-type Article (original research)
DOI 10.1103/PhysRevE.73.045302
Open Access Status File (Publisher version)
Volume 73
Issue 4
Start page 045302-1
End page 045302-4
Total pages 4
Place of publication College Park, MD United States
Publisher American Physical Society
Language eng
Abstract We report results of investigations of a high-speed drainage of thin aqueous films squeezed between randomly nanorough surfaces. A significant decrease in the hydrodynamic resistance force as compared with that predicted by Taylor's equation is observed. However, this reduction in force does not represent the slippage. The measured force is exactly the same as that between equivalent smooth surfaces obeying no-slip boundary conditions, but located at the intermediate position between peaks and valleys of asperities. The shift in hydrodynamic thickness is shown to be independent of the separation and/or shear rate. Our results disagree with previous literature data reporting very large and shear-dependent boundary slip for similar systems.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
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Citation counts: TR Web of Science Citation Count  Cited 73 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 71 times in Scopus Article | Citations
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Created: Thu, 14 May 2015, 17:20:42 EST by Gleb Yakubov on behalf of School of Mathematics & Physics