格子ボルツマン法を用いた血栓生成のシミュレーション(流体工学,流体機械)

概要

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This paper describes the prediction of index of thrombus formation in shear blood flow by computational fluid dynamics (CFD) with Lattice Boltzmann Method (LBM), applying to backward facing flow, which is simple model of shear flow in the rotary blood pumps and complicated geometry of medical fluid devices. Assuming that the blood flow is multiphase flow composed of blood plasma and solid protein, the effects of surface tension and adhesion force to the wall are added to LBM computation. It is found that the thrombus formation occurs just after the reattachment point and behind the step. These results correspond to our previous observation results. To predict thrombus formation in every case of blood flow, effects of threshold level of physical parameters such as shear rate, adhesion force (effective distance from the wall) are estimated.
2007-12-25