C-333 離散要素モデルに基づいたトムズ効果のモデリング

概要

論文の詳細を見る
A model of Toms effect is proposed based on a discrete element model. The advantage of the calculation using a discrete model to the calculation using a constitutive equation is that the interaction between the element (polymer) and the medium fluid is directly treated and it is helpful to know the mechanism of the phenomenon. The scale of the discrete model, however, is usually much larger than that of the real polymer because of the restriction of the grid resolution for the flow simulation. The scale of the model should be nearly the same order of that of the turbulent fluctuation. So the model may not simulate the real effect of polymers but affect. directly the turbulent fluctuation. In this study, we apply a statistical technique on a discrete element model to remove the restriction on the element size. In the new model, polymers can be represented by small (subgrid scale) discrete elements.
日本流体力学会の論文
2003-07-28