Large Eddy Simulation による平行平板固気混相乱流の数値解析

概要

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A particle-laden channel flow has been simulated by a large eddy simulation, which is expected to have a substitutability for DNS in order to make $\kappa-\epsilon$ model for suspension flow minute. The numerical results for the fluid turbulence modulation due to particles are strongly depends on how exact the particle motion is described, especially particle/wall interaction and interparticle collision. In addition to that, it is necessary to modify the sub-grid scale (SGS) turbulence model to take the interaction between particle and small scale turbulence into account. The effort of modification of SGS scale model, however, might cause the same difficulties as the suspension $\kappa$-$\epsilon$ model development This paper proposes LES model for the gas-solid suspension flow by using Localized Dynamic $\kappa_{SGS}$ Equation Model, which can determine model constants dynamically and has possibility of considering back-scatter energy transfer including particulate medium. The proposed model is applied to prediction of a channel flow experiment by Kulick et al.
九州大学の論文
2000-09-30