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Sliding friction in the hydrodynamic lubrication regime for a power-law fluid
| Content Provider | Scilit |
|---|---|
| Author | Warren, P. B. |
| Copyright Year | 2016 |
| Description | Journal: Journal of Physics: Condensed Matter A scaling analysis is undertaken for the load balance in sliding friction in the hydrodynamic lubrication regime, with a particular emphasis on power-law shear-thinning typical of a structured liquid. It is argued that the shear-thinning regime is mechanically unstable if the power-law index n < 1/2, where n is the exponent that relates the shear stress to the shear rate. Consequently the Stribeck (friction) curve should be discontinuous, with possible hysteresis. Further analysis suggests that normal stress and flow transience (stress overshoot) do not destroy this basic picture, although they may provide stabilising mechanisms at higher shear rates. Extensional viscosity is also expected to be insignificant unless the Trouton ratio is large. A possible application to shear thickening in non-Brownian particulate suspensions is indicated. |
| Related Links | http://iopscience.iop.org/article/10.1088/1361-648X/29/6/064005/pdf |
| ISSN | 09538984 |
| e-ISSN | 1361648X |
| DOI | 10.1088/1361-648x/29/6/064005 |
| Journal | Journal of Physics: Condensed Matter |
| Issue Number | 6 |
| Volume Number | 29 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2016-12-21 |
| Access Restriction | Open |
| Subject Keyword | Journal: Journal of Physics: Condensed Matter Fluids and Plasmas Physics Load Balance Shear Stress Sliding Friction Normal Stress Hydrodynamic Lubrication Regime |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics Materials Science |
