Generation and characterization of absolute equilibrium of compressible flows
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2009Metadata
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Krstulovic, Giorgio
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Generation and characterization of absolute equilibrium of compressible flows
Abstract
A short review is given of recent papers on the relaxation to (incompressible) absolute equilibrium.
A new algorithm to construct absolute equilibrium of spectrally truncated compressible
flows is described. The algorithm uses stochastic processes based on the Clebsch representation
of the velocity field to generate density and velocity fields that follow by construction the absolute
equilibrium stationary probability. The new method is shown to reproduce the well-known
Gaussian results in the incompressible limit. The irrotational compressible absolute equilibrium
case is characterized and the distribution is shown to be non-Gaussian. The high-temperature
compressible spectra are found not to obey k2 scaling. Finally, oscillating behavior in constantpressure
variable-temperature relaxation is obtained, suggesting the presence of second sound.
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Artículo de publicación ISI.
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URI: https://repositorio.uchile.cl/handle/2250/126142
DOI: doi: 10.1142/S021812740902489X
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International Journal of Bifurcation and Chaos, Vol. 19, No. 10 (2009) 3445–3459
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