Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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A Simple Lagrangian PDF Model for Wall-Bounded Turbulent Flows

  • Lee, Chang-Hoon (Department of Mechanical Engineering, University of Seoul) ;
  • Kim, Byung-Gu (Department of Mechanical Engineering, University of Seoul) ;
  • Kim, Nam-Hyun (Department of Applied Mathematics, Hongik University)
  • Published : 2000.08.01
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Abstract

A simple Lagrangian pdf model is proposed with a new numerical algorithm for application in wall-bounded turbulent flows. To investigate the performance of the Lagrangian model, we minimize model's dependence on empirical constants by selecting the simplest model for turbulent dissipation rate. The effect of viscosity is also included by adding a Brownian random walk calculate the position of a particle. For the no-slip condition at the wall and correct nearwall behavior of velocity, we develop a new boundary treatment for the particles that strike the wall. By applying the model to a fully developed turbulent channel flow at low Reynolds number, we investigate the model's performance through comparison with direct numerical simulation result.

Keywords

References

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