A New Dynamic SGS Model for Large Eddy Simulation of Particle-Laden Turbulent Flows

Abstract

The paper presents a new dynamic SGS model of two-way coupling for large eddy simulation of particle-laden turbulent flow. The advantage of this new model is that coupling of fluid-particles SGS components was taken into account and at the same time the coefficient of proposed SOS model can be optimized by Germano's (1991) dynamic procedure. To investigate the capability of this model, numerical simulations of particle-laden turbulent flow at Re=644 in a vertical channel were performed using this new dynamic SGS model. By comparing the calculation results with that using single-phase SGS models which didn't consider coupling of SGS components the role of particles SGS components played in the turbulence modulation of fluid flow was clarified for particle-laden channel turbulent flows. In addition, the subgrid-scale stresses obtained using the proposed model vanish at wall boundary, and have the correct asymptotic behavior in the near-wall region of the turbulent boundary.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2001
Accession Number
ADP013650

Entities

People

  • Kangbin Lei
  • Nobuyuki Taniguchi
  • Toshio Kobayashi

Organizations

  • RIKEN

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundaries
  • Channel Flow
  • Coefficients
  • Couplings
  • Energy
  • Energy Production
  • Equations
  • Filters
  • Flow
  • Fluid Flow
  • Large Eddy Simulation
  • Modulation
  • Molecular Dynamics
  • Particle Collisions
  • Simulations
  • Turbulence
  • Turbulent Flow

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Fluid Dynamics.