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.
考察了颗粒质量分数、颗粒直径和流体速度对渐近污垢热阻的影响。
The effects of fluid velocity, particle diameter, and bulk particle concentration on the asymptotic fouling resistance were also studied.
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.
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