Proposal of Capillary Force Model, Considering Non-slip Boundary Condition

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  • すべりなし効果を考慮した液架橋力モデルの提案
  • スベリ ナシ コウカ オ コウリョ シタ エキ カキョウリョク モデル ノ テイアン

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<p>DEM simulation of wet granulation has been performed by applying population balance in most cases found in the literature. From the point of view of industry, DEM simulation based on force balance in required for discussing the effects of the amount of binder, spray characteristics, and so on. This paper proposes new idea of capillary force model, considering non-slip boundary condition between particles and particle/wall, called “Non-slip capillary force model.” In this model, capillary forces work between interacting points, which are generated on the surface of particle when capillary is created between particles, and the interacting points are fixed on the surface of particles, meaning that the position of the interacting point changes according to rotational motions of particles. This force model is applied to the two systems: 1) collision of an aggregate against wall, and 2) wet granular system. The following results are achieved through the research: a) aggregates are generated with non-slip capillary force model and the aggregate shows properties of rigid body, b) the aggregate can be broken, when the collision force is over the capillary force. From these results, it can be expected that “Non-slip capillary force model” is inevitable for DEM simulation for wet granulation process.</p>

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