用一个体积分数F来定义流体区域，并用它来跟踪自由界面的运动。
A volume fraction specification, f, is used to define fluid region, and to track the movement of free boundaries.
采用双流体数学模型通过数值模拟发现：在层流条件下，双流体模型能够很好地模拟颗粒相体积分数、管径和R e对相变区间的影响。
In this paper, the Euler-Euler model was used to numerically analyze the influences of the particle volume fraction, the diameter of tube and the Reynolds number on the phase-change region.
结果表明：金属流体的浸渗充型随着纤维体积分数的增大，从非均衡浸渗向均衡浸渗变化。
The results show that with the increase of fiber volume fraction, the unhomogeneous infiltration of liquid metal changes into homogeneous one.
纳米流体的对流传热系数随着颗粒和基液热导率的增加、颗粒体积分数的增加以及颗粒粒径的减小而增大。
The heat transfer coefficient of nanofluids increases with increasing the thermal conductivity of nanoparticles and base fluid, and increases with an increase in the volume fraction of nanoparticles.
纳米流体的对流传热系数随着颗粒和基液热导率的增加、颗粒体积分数的增加以及颗粒粒径的减小而增大。
The heat transfer coefficient of nanofluids increases with increasing the thermal conductivity of nanoparticles and base fluid, and increases with an increase in the volume fraction of nanoparticles.
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