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POSTER PRESENTATION
Tuesday, 15:40, Panel No. 1
Towards experimental tests of the Brenner modification to the Navier-Stokes equations: Dynamic light scattering
A. Bardow, M. Kröger, H.C. Öttinger
Institute of Polymers, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland
A modification of the classical Navier-Stokes equations has recently been proposed by Brenner (Physica A 349 (2005) 11, 60). In the modified theory, a contribution for mass diffusion is included in the continuity equation. A formal model could then be derived using the GENERIC framework of nonequilibrium thermodynamics. The modified theory was based on experimental support from thermophoresis which however depends on the correct formulation of boundary conditions. The controversy therefore remained. Since such an additional mass diffusion transport mode should contribute to dynamic light scattering spectra, the consequences of the modified theory for light scattering spectra are discussed in this work. For liquids, the new theory is consistent with measured scattering data since the modification to the spectrum is usually negligible. The effect could, however, be observable in gases. The relationship to existing experimental data is discussed. © IWNET 2006
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and Kleanthi for IWNET 2006