Abstract
Compared to macroscopic systems, fluids on the micro- and nanoscales have a larger surface-to-volume ratio, thus the boundary condition becomes crucial in determining the fluid properties. No-slip boundary condition has been applied successfully to wide ranges of macroscopic phenomena, but its validity in microscopic scale is questionable. A more realistic description is that the flow exhibits slippage at the surface, which can be characterized by a Navier slip length. We present a tunable-slip method by implementing Navier boundary condition in particle-based computer simulations (Dissipative Particle Dynamics as an example). To demonstrate the validity and versatility of our method, we have investigated two model systems: (i) the flow past a patterned surface with alternating no-slip/partial-slip stripes and (ii) the diffusion of a spherical colloidal particle.
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Acknowledgements
We thank the HLRS Stuttgart for a generous grant of computer time on HERMIT. This research was supported by the DFG through the SFB TR6, SFB 985, SFB 1066, and by RAS through its priority program “Assembly and Investigation of Macromolecular Structures of New Generations”.
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Zhou, J., Smiatek, J., Asmolov, E.S., Vinogradova, O.I., Schmid, F. (2015). Application of Tunable-Slip Boundary Conditions in Particle-Based Simulations. In: Nagel, W., Kröner, D., Resch, M. (eds) High Performance Computing in Science and Engineering ‘14. Springer, Cham. https://doi.org/10.1007/978-3-319-10810-0_2
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DOI: https://doi.org/10.1007/978-3-319-10810-0_2
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