Modeling an efficient Brownian heat engine |
| |
Authors: | Mesfin Asfaw |
| |
Institution: | (1) Corporate Technology, Information&Communications, Siemens AG, 81730 München, Germany;(2) Thiele Centre for Applied Mathematics in Natural Science, Aarhus University, 8000 Aarhus, Denmark |
| |
Abstract: | We discuss various properties of a homogeneous random multifractal
process, which are related to the issue of scale correlations. By
design, the process has no built-in scale correlations. However, when
it comes to observables like breakdown coefficients, which are based on
a coarse-graining of the multifractal field, scale correlations do
appear. In the log-normal limit of the model process, the conditional
distributions and moments of breakdown coefficients reproduce the
observations made in fully developed small-scale turbulence. These
findings help to understand several puzzling empirical details, which
have been extracted from turbulent data already some time ago. |
| |
Keywords: | PACS" target="_blank">PACS 47 27 eb Statistical theories and models 47 27 Gs Isotropic turbulence homogeneous turbulence 47 53 +n Fractals in fluid dynamics 02 50 Ey Stochastic processes 02 50 Ga Markov processes |
本文献已被 SpringerLink 等数据库收录! |
|