TY - Type of reference
TI - Some Aspects of Turbulence in Discrete Mechanics
AU - Jean-Paul Caltagirone
AU - Stéphane Vincent
AB - The discrete mechanics formalism and equations are considered in the present work in order to establish the role played by representative motion equations on the study of turbulence in fluids. In particular, a set of differences related to the turbulent pressure, the dynamics of vorticity in two spatial dimensions, the turbulent dissipation or the divergence of acceleration are discussed compared to the classical continuous media and Navier-Stokes equations. A second part is devoted to presenting on a first example, the rigid rotational motion, the differences between discrete and continuum mechanics. A last section is devoted to simulating the turbulent channel flow at turbulent Reynolds number of Reτ = 590. It is demonstrated that discrete mechanics allow to recover accurately the mean velocity profiles of reference DNS and also to provide scale laws of the whole mean velocity profile from the wall to the center of the channel.
DO - 10.21494/ISTE.OP.2019.0328
JF - Thermodynamics of Interfaces and Fluid Mechanics
KW - Discrete Mechanics, Hodge-Helmholtz decomposition, Lamb vector, Turbulent channel flow, Law of the wall, Dynamics of the vorticity, turbulent dissipation, Discrete Mechanics, Hodge-Helmholtz decomposition, Lamb vector, Turbulent channel flow, Law of the wall, Dynamics of the vorticity, turbulent dissipation,
L1 - http://openscience.fr/IMG/pdf/iste_timf19v3n1_2.pdf
LA - en
PB - ISTE OpenScience
DA - 2019/02/5
SN - 2514-4642
TT - Quelques aspects de la turbulence en mécanique discrète (anglais)
UR - http://openscience.fr/Some-Aspects-of-Turbulence-in-Discrete-Mechanics
IS - Issue 1
VL - 3
ER -