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          Institute: MPI für Dynamik und Selbstorganisation     Collection: Dynamik komplexer Fluide     Display Documents



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ID: 339892.0, MPI für Dynamik und Selbstorganisation / Dynamik komplexer Fluide
Thermal Noise Influences Fluid Flow in Thin Films during Spinodal Dewetting
Authors:Fetzer, R.; Rauscher, M.; Seemann, R.; Jacobs, K.; Mecke, K.
Language:English
Date of Publication (YYYY-MM-DD):2007-09-13
Title of Journal:Physical Review Letters
Volume:99
Start Page:114503-1
End Page:114503-4
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Experiments on dewetting thin polymer films confirm the theoretical prediction that thermal noise can
strongly influence characteristic time scales of fluid flow and cause coarsening of typical length scales.
Comparing the experiments with deterministic simulations, we show that the Navier-Stokes equation has
to be extended by a conserved bulk noise term to accomplish the observed spectrum of capillary waves.
Because of thermal fluctuations the spectrum changes from an exponential to a power law decay for large
wave vectors. Also the time evolution of the typical wave vector of unstable perturbations exhibits noiseinduced
coarsening that is absent in deterministic hydrodynamic flow.
External Publication Status:published
Document Type:Article
Communicated by:Folkert Müller-Hoissen
Affiliations:MPI für Dynamik und Selbstorganisation/Dynamik komplexer Fluide
External Affiliations:Department of Experimental Physics, Saarland University, 66041 Saarbrücken, Germany
Max-Planck-Institut für Metallforschung, Heisenbergstraße 3, 70569 Stuttgart, Germany
Institut für Theoretische Physik, Universität Erlangen-Nürnberg, Staudtstraße 7, 91058 Erlangen, Germany
Identifiers:DOI:10.1103/PhysRevLett.99.114503
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