Gas-kinetic simulation of sustained turbulence in minimal Couette flow
Journal Article
·
· Physical Review Fluids
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Imperial College, London (United Kingdom)
Here, 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. Finally, 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.
- Research Organization:
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC04-94AL85000; NA0003525
- OSTI ID:
- 1485844
- Alternate ID(s):
- OSTI ID: 1461724
- Report Number(s):
- SAND--2018-12692J; 669858
- Journal Information:
- Physical Review Fluids, Journal Name: Physical Review Fluids Journal Issue: 7 Vol. 3; ISSN 2469-990X
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
On the basic concepts of the direct simulation Monte Carlo method
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journal | June 2019 |
Direct simulation Monte Carlo on petaflop supercomputers and beyond
|
journal | August 2019 |
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