Direct observation of hydrodynamic instabilities in driven non-uniform colloidal dispersions

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dc.creatorWysocki, Adam
dc.creatorRoyall, C. Patrick
dc.creatorWinkler, Roland G.
dc.creatorGompper, Gerhard
dc.creatorTanaka, Hajime
dc.creatorvan Blaaderen, Alfons
dc.creatorLöwen, Hartmut
dc.date2008-10-07
dc.date.accessioned2026-07-07T10:08:10Z
dc.date.available2026-07-07T10:08:10Z
dc.descriptionA Rayleigh-Taylor-like instability of a dense colloidal layer under gravity in a capillary of microfluidic dimensions is considered. We access all relevant lengthscales with particle-level microscopy and computer simulations which incorporate long-range hydrodynamic interactions between the particles. By tuning the gravitational driving force, we reveal a mechanism whose growth is connected to the fluctuations of specific wavelengths, non-linear pattern formation and subsequent diffusion-dominated relaxation. Our linear stability theory captures the initial regime and thus predicts mixing conditions, with important implications for fields ranging from biology to nanotechnology.
dc.description4 pages, 3 figures, submitted to Phys. Rev. Lett., movies available at http://www2.thphy.uni-duesseldorf.de/~adam/
dc.identifierhttps://arxiv.org/abs/0810.1258
dc.identifierhttp://arxiv.org/abs/0810.1258
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/170902
dc.subjectSoft Condensed Matter
dc.titleDirect observation of hydrodynamic instabilities in driven non-uniform colloidal dispersions
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