Detailed Information on Publication Record
2013
Ab initio construction of the 2-point velocity difference PDF for incompressible Navier-Stokes fluids
CREMASCHINI, Claudio and Massimo TESSAROTTOBasic information
Original name
Ab initio construction of the 2-point velocity difference PDF for incompressible Navier-Stokes fluids
Name (in English)
Ab initio construction of the 2-point velocity difference PDF for incompressible Navier-Stokes fluids
Authors
CREMASCHINI, Claudio and Massimo TESSAROTTO
Edition
European Physical Journal Plus, DE - Spolková republika Německo, 2013, 2190-5444
Other information
Type of outcome
Článek v odborném periodiku
Field of Study
10300 1.3 Physical sciences
Confidentiality degree
není předmětem státního či obchodního tajemství
References:
Organization unit
Institute of physics in Opava
UT WoS
000323268200004
Keywords in English
Probability Density-function; Lagrangian dynamics; Turbulent flows
Tags
Tags
International impact, Reviewed
Links
EE2.3.20.0071, research and development project.
Změněno: 29/3/2021 10:27, Mgr. Pavlína Jalůvková
Abstract
V originále
Characterizing hydrodynamic turbulence in terms of the so-called 2-point velocity difference statistics is a basic aspect of fluid dynamics, both from the theoretical and experimental viewpoints. The issue concerns in particular the first-principle construction of the corresponding 2-point velocity difference probability density function (PDF) as well as the transport equation which determines its time evolution. The goal of this paper is to point out that the problem can be solved by suitably prescribing the ensemble-averaging operator to be employed in the statistical description of fluids. As a result, qualitative properties of the 2-point PDF which are usually ascribed to the occurrence of turbulence are shown to follow from the ab initio approachpresented here and to characterize both deterministic and stochastic fluid descriptions.