Simulations of slip flow on nanobubble-laden surfaces
Two-phase lattice Boltzmann simulations of a flow over structured surfaces with attached gas bubbles are presented and it is demonstrated how the detected slip depends on the pattern geometry, the bulk pressure, or the shear rate.
Mechanobiological oscillators control lymph flow
- C. Kunert, J. Baish, S. Liao, T. Padera, L. Munn
- BiologyProceedings of the National Academy of Sciences
- 17 August 2015
This model predicts that the Ca2+ and NO levels alternate spatiotemporally, establishing complementary feedback loops, and that the resulting phasic contractions drive lymph flow, allowing the lymphatic vessels to provide pumping when needed but remain open when flow can be driven by tissue pressure or gravity.
Roughness induced boundary slip in microchannel flows.
It is found that the apparent slip is independent of the detailed boundary shape, but only given by the distribution of surface heights, and it is shown that slip diverges as the amplitude of the roughness increases which highlights the importance of a proper treatment of surface variations in very confined geometries.
Synchronization and Random Triggering of Lymphatic Vessel Contractions
Using numerical simulation and linear stability analysis, it is shown that the newly identified shear-NO oscillator shares similarities with the well-known Van der Pol oscillator, but has unique characteristics.
Lattice Boltzmann simulations in microfluidics: probing the no-slip boundary condition in hydrophobic, rough, and surface nanobubble laden microchannels
In this contribution, we review recent efforts on investigations of the effect of (apparent) boundary slip by utilizing lattice Boltzmann simulations. We demonstrate the applicability of the method…
Lattice Boltzmann simulations of apparent slip in hydrophobic microchannels
Various experiments have found a boundary slip in hydrophobic microchannel flows, but a consistent understanding of the results is still lacking. While Molecular Dynamics (MD) simulations cannot…
Random-roughness hydrodynamic boundary conditions.
The results of lattice Boltzmann simulations of a high-speed drainage of liquid films squeezed between a smooth sphere and a randomly rough plane support some previous experimental conclusions on a very large and shear-dependent boundary slip for similar systems.
Borosilicate glass of high chemical resistance, and uses thereof
Borosilicate glass of high chemical resistance, marked by a composition (in wt .-% on oxide) of: SiO 70-77 B 6 8-9.5 K 0- 8-11 MgO 0-2 CaO 0-2.5 MgO + CaO 0-3 ZrO 0- <0.5 CeO 0-1 and optionally…
Boundary effects in microfluidic setups
Due to large surface to volume ratios in microfluidic setups, the roughness of channel surfaces must not be neglected since it is not any longer small compared to the length scale of the system. In…