2009/08/25 by J. L. Nagle, P. Steinberg, W. A. Zajc · 1 citation
Engineering · Mathematics · Physics and Astronomy · #Fluid Dynamics and Turbulent Flows #Gas Dynamics and Kinetic Theory #High-Energy Particle Collisions Research #nucl-th
paper · pdf · doi:10.1103/physrevc.81.024901
published as Phys.Rev.C81:024901,2010 · 11 pages, 6 figures, submitted for refereed publication
arxiv created 2009/08/25 · openalex publication_date 2010/02/02 · arxiv updated 2010/04/06 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
In this article, we examine the methodology for extracting the Knudsen number (K) and the ratio of shear viscosity to entropy density (\ensuremathη/s) developed by Drescher et al. [1]. The final result for \ensuremathη/s turns out to be quite sensitive to Glauber parameters, particularly the parameter x, which controls the balance between Npart and Ncoll. We also explore how alternative formulations of the functional relation between the elliptic flow and Knudsen number (K=\ensuremathλ/\mathrmR\ifmmode \else \=\fi) impacts the physics conclusions, based on Pad'e approximants. Finally, we extend the calculation to include a limiting minimum value on the mean free path proportional to the DeBroglie wavelength. These results emphasize the importance of clarifying the initial state used in different calculations as well as the ambiguities inherent in using a transport approach in a strongly coupled regime.