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WU Hong, WANG Jiao. Large eddy simulation of square duct turbulence based on the lattice Boltzmann method[J]. Journal of Aerospace Power, 2012, 27(1): 1-8.
Citation: WU Hong, WANG Jiao. Large eddy simulation of square duct turbulence based on the lattice Boltzmann method[J]. Journal of Aerospace Power, 2012, 27(1): 1-8.
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Large eddy simulation of square duct turbulence based on the lattice Boltzmann method

  • National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 2011-03-04
  • Rev Recd Date: 2011-07-06
  • Publish Date: 2012-01-28
    Abstract
  • Large eddy simulation(LES),based on the lattice Boltzmann equation (LBE),was used to study the square duct turbulent flow at a shear Reynolds number equal to 300 based on the hydraulic diameter and the friction velocity.The flow field was simulated by the multiple relaxation time lattice Boltzmann equation.The non-closure term after filtering was modeled by the shear improved Smagorinsky sub-grid stress model.To combine the lattice Boltzmann and large eddy simulation,the subgrid scales turbulent viscosity was related to the subgrid-scale relaxation time.Then the effective relaxation times were computed locally.The turbulent statistics quantities,including the mean streamwise velocity,mean second velocity,the root-mean-square velocity and the instantaneous streamwise voriticity on different sections,were computed.The comparison result,with the DNS and experimental data,shows that the LES based on the LBE can be used to study the bounded turbulent flow.

     

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