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对不同纤维体积分数和不同纤维分布状态的纤维模型进行数值模拟,分析纤维微结构的改变对流体流动行为的影响。结果表明,在纤维体积分数低时,纤维间最小距离对平均渗透率影响小;在纤维体积分数高时,平均渗透率随着最小距离的减小而减小。研究渗透率标准偏差与最小距离、体积分数三者关系,在纤维体积分数低时,渗透率的标准偏差主要由最小距离决定;在纤维体积分数高时,渗透率的标准偏差由纤维体积分数及最小距离共同决定。
The fiber models with different fiber volume fractions and different fiber distributions were numerically simulated to analyze the effect of fiber microstructure changes on fluid flow behavior. The results show that when the fiber volume fraction is low, the minimum distance between the fibers has little effect on the average permeability. At the high fiber volume fraction, the average permeability decreases with the decrease of the minimum distance. The standard deviation of permeability is related to the minimum distance and volume fraction. When the volume fraction of fiber is low, the standard deviation of permeability is mainly determined by the minimum distance. When the fiber volume fraction is high, the standard deviation of permeability is determined by the fiber volume fraction And the minimum distance to decide.