Dresden 2006 – wissenschaftliches Programm
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DY: Dynamik und Statistische Physik
DY 46: Poster
DY 46.105: Poster
Donnerstag, 30. März 2006, 16:00–18:00, P1
Ripple formation under shearing — •C.A. Krülle1, A. Wierschem2, N. Aksel2, and I. Rehberg1 — 1Experimentalphysik V, Universität Bayreuth, D-95440 Bayreuth — 2Technische Mechanik und Strömungsmechanik, Universität Bayreuth, D-95440 Bayreuth
Our understanding of the formation of ripples and dunes in the desert or at the beach can be regarded as a paradigm for a nonequilibrium process which can be treated with modern methods of nonlinear dynamics and structure formation. The main goals of our interdisciplinary project, which combines methods and expertises of fluid mechanics and experimental physics, are (i) the detailed experimental investigation of the complex interactions between the driving fluid and the granular bed, (ii) to clarify the question, whether turbulent currents are necessary for ripple formation, and (iii) the validation of continuum models with our experimental data.