D123 二相乱流中の両相間の運動量交換に対する指向性について

概要

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The mechanism of energy transport by particles in a turbulent channel flow was investigated by large eddy simulation considering directional scale dependency on force coupling between particles and turbulence. The present coupling method introduced the weighted functions to distribute the momentum from particles to grid points in a wider region considering the energy backscatter enhanced by particles, which was ensured by the experiments by Sato et al. (2001). The coupling method with different distribution scales were examined and it was found that a distribution scale has a significant influence on modification to fluid turbulence. The expansion of the momentum-distribution scale in the transverse direction had more significant effect than the expansion in other two directions and realized the directional scale-dependent structure of turbulence modification by particles.
2001-07-31