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Title: A simple dynamic subgrid-scale model for LES of particle-laden turbulence

Journal Article · · Physical Review Fluids
 [1];  [1];  [1];  [1]
  1. Stanford Univ., CA (United States). Center for Turbulence Research

In this study, a dynamic model for large-eddy simulations is proposed in order to describe the motion of small inertial particles in turbulent flows. The model is simple, involves no significant computational overhead, contains no adjustable parameters, and is flexible enough to be deployed in any type of flow solvers and grids, including unstructured setups. The approach is based on the use of elliptic differential filters to model the subgrid-scale velocity. The only model parameter, which is related to the nominal filter width, is determined dynamically by imposing consistency constraints on the estimated subgrid energetics. The performance of the model is tested in large-eddy simulations of homogeneous-isotropic turbulence laden with particles, where improved agreement with direct numerical simulation results is observed in the dispersed-phase statistics, including particle acceleration, local carrier-phase velocity, and preferential-concentration metrics.

Research Organization:
Stanford Univ., CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0002373
OSTI ID:
1536424
Alternate ID(s):
OSTI ID: 1351693
Journal Information:
Physical Review Fluids, Vol. 2, Issue 4; ISSN 2469-990X
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 28 works
Citation information provided by
Web of Science

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Cited By (3)

Predicting viscous-range velocity gradient dynamics in large-eddy simulations of turbulence journal December 2017
Model for the dynamics of micro-bubbles in high-Reynolds-number flows journal October 2019
Particles in turbulent separated flow over a bump: Effect of the Stokes number and lift force journal October 2019

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