Gas-kinetic simulation of sustained turbulence in minimal Couette flow
File(s)PRF_DSMC_MCF_v050.pdf (688.54 KB)
Accepted version
Author(s)
Type
Journal Article
Abstract
We provide a demonstration that gas-kinetic methods incorporating molecular chaos can simulate the sustained turbulence that occurs in wall-bounded turbulent shear flows. The direct simulation Monte Carlo method, a gas-kinetic molecular method that enforces molecular chaos for gas-molecule collisions, is used to simulate the minimal Couette flow at Re=500. The resulting law of the wall, the average wall shear stress, the average kinetic energy, and the continually regenerating coherent structures all agree closely with corresponding results from direct numerical simulation of the Navier-Stokes equations. These results indicate that molecular chaos for collisions in gas-kinetic methods does not prevent development of molecular-scale long-range correlations required to form hydrodynamic-scale turbulent coherent structures.
Date Issued
2018-07-26
Date Acceptance
2018-07-03
Citation
Physical Review Fluids, 2018, 3 (7)
ISSN
2469-990X
Publisher
American Physical Society
Journal / Book Title
Physical Review Fluids
Volume
3
Issue
7
Copyright Statement
© 2018 American Physical Society.
Subjects
Science & Technology
Physical Sciences
Physics, Fluids & Plasmas
Physics
NEAR-WALL TURBULENCE
BOLTZMANN-EQUATION
MONTE-CARLO
Publication Status
Published
Article Number
071402
Date Publish Online
2018-07-26