| Full text | |
| Author(s): |
Total Authors: 4
|
| Affiliation: | [1] Univ Sao Paulo, Escola Politecn, BR-05508030 Sao Paulo - Brazil
[2] Univ Sao Paulo, Inst Phys, BR-05508090 Sao Paulo - Brazil
Total Affiliations: 2
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| Document type: | Journal article |
| Source: | Physics of Fluids; v. 33, n. 6 JUN 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
The influence of temperature on interfacial fluid slip, as measured by molecular dynamics simulations of a Couette flow comprising a Lennard-Jones fluid and rigid crystalline walls, is examined as a function of the fluid-solid interaction strength. Two different types of thermal behavior are observed, namely, the slippery and sticky cases. The first is characterized by a steep and unlimited increase in the slip length at low temperatures, while the second presents a vanishing slip length in this regime. As the temperature increases in relation to a characteristic value, both cases converge to finite slip lengths. A recently proposed analytical model is found to well describe both thermal behaviors, also predicting the slippery-sticky transition that occurs at a critical value of the fluid-solid interaction parameter, for which, according to the model, fluid particles experience a smooth average energy landscape at the interface. (AU) | |
| FAPESP's process: | 14/50279-4 - Brasil Research Centre for Gas Innovation |
| Grantee: | Julio Romano Meneghini |
| Support Opportunities: | Research Grants - Research Centers in Engineering Program |
| FAPESP's process: | 18/03211-6 - Non linear dynamics |
| Grantee: | Iberê Luiz Caldas |
| Support Opportunities: | Research Projects - Thematic Grants |