在自由体积扩散理论的基础上，提出了渗透蒸发过程中二元水溶液在聚合物膜中扩散的修正自由体积模型。
A modified free - volume diffusion model for binary aqueous mixtures in pervaporation was developed on the basis of free -volume diffusion theory.
模型中水动力方程和泥沙扩散方程均采用幂函数方案的有限体积法离散。
In the model, the finite volume method discrete of power function is adopted for the hydrodynamic and silt diffusion equations.
随着沉淀相体积分数的增大，沉淀颗粒间的扩散场相互作用加强，对其沉淀相组织形貌及其成分的影响也更加显著。
With increase of the precipitate volume fraction, the influence of the inter-particle diffusional interaction on the precipitate morphology and the composition will become stronger.
对多孔介质体积平均理论进行简化，得到简化的热质传递干燥模型，用一个理论式表达模型中有效扩散系数。
Based on the fact, a simplified drying model of heat and mass transfer is deduced from volume average theory.
将有限体积和有限元方法相结合，解决对流扩散方程问题，并给出了稳定性分析。
In this paper, finite bulk-finite element means is presented for solving convection-diffusion problem, moreover give out the stability analysis.
水凝胶中扩散理论模型主要有自由体积模型、流体力学模型、位阻效应模型三大类；
The theoretical models consist of three categories: free volume, hydrodynamic, and obstruction effect models.
结果表明：粉体与溶胶的结合减少了粉体的扩散和体积收缩，得到与不锈钢结合良好且无开裂的涂层。
The results show that the combination of ZrO2 gel and nano-powder decreases diffuse and volume shrinkage. The coating which has no crack and good combination with stainless steel is obtained.
随覆层材料体积比的增加、扩散退火温度的升高及扩散退火时间的延长而升高。
Conductivity was increased with the increase of volume ratio, annealing temperature and annealing time.
不同的机理对T1和T2都有贡献，表面驰豫和体积驰豫对T1和T2有贡献，表面驰豫、体积驰豫和扩散驰豫对T2有贡献。
Different mechanisms contribute to T1 and T2. Surface relaxation and bulk relaxation contribute to both T1 and T2. Surface, bulk and diffusion relaxations contribute to T2.
采用有限差分法数值求解扩散方程，分别利用等距网格和等体积网格划分计算区域。
In this paper, the finite difference method is used to solve the diffusion equation and the spherical particle is discretized with iso-spacing grids and iso-volumetric grids respectively.
分析水平面与竖直面氧化空气体积分数分布，考察射流对氧化空气的扩散作用。
Analysis of the air volume fraction distribution of oxidation air of horizontal and vertical plane is used to investigate the effect of the rotary jet mixing device diffusing the oxidation air.
以有限体积法为核心，建立了求解二维浅水方程和对流扩散方程的模型体系。
Based on the Finite Volume Methods (FVM), model system is developed to solve the 2d shallow water equation and convection-diffusion equation.
以有限体积法为核心，建立了求解二维浅水方程和对流扩散方程的模型体系。
Based on the Finite Volume Methods (FVM), model system is developed to solve the 2d shallow water equation and convection-diffusion equation.
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