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- W4377130887 abstract "Analytical expressions for the velocity field and the effective slip length of pressure-driven Stokes flow through slippery pipes and annuli with rotationally symmetrical longitudinal slits are derived. Specifically, the developed models incorporate a finite local slip length or shear stress along the slits and thus go beyond the assumption of perfect slip commonly employed for superhydrophobic surfaces. Thereby, they provide the possibility to assess the influence of both the viscosity of the air or other fluid that is modelled to fill the slits as well as the influence of the micro-geometry of these slits. Firstly, expressions for tubes and annular pipes with superhydrophobic or slippery walls are provided. Secondly, these solutions are combined to a tube-within-a circular pipe scenario, where one fluid domain provides a slip to the other. This scenario is interesting as an application to achieve stable fluid-fluid interfaces. With respect to modelling, it illustrates the specification of the local slip length depending on a linked flow field. The comparisons of the analytically calculated solutions with numerical simulations shows excellent agreement. The results of this article thus represent an important instrument for the design and optimization of slippage along surfaces in circular geometries." @default.
- W4377130887 created "2023-05-21" @default.
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- W4377130887 date "2023-05-18" @default.
- W4377130887 modified "2023-09-29" @default.
- W4377130887 title "Analytical models for pressure-driven Stokes flow through superhydrophobic and liquid infused tubes and annular pipes" @default.
- W4377130887 doi "https://doi.org/10.48550/arxiv.2305.10777" @default.
- W4377130887 hasPublicationYear "2023" @default.
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