以NaCl溶液和纯水快速接触质量传递过程为例，进行了快速瞬态扩散传质的实验与理论研究。实验测定了质量传播速度与瞬态浓度分布等的变化规律，揭示了快速瞬态扩散传质所具有的不同于经典扩散理论所描述的物理机制，并进行了相应的理论分析。结果表明，理论计算与实验结果吻合良好，修正的Fick定律表达式能更真实的反映快速瞬态扩散传质规律
The experiments of rapid transient mass diffusion between NaCl liquor and purewater are conducted. The changing law of mass propagation speed and theconcentration profiles et al are determined by experiments. The physicalmechanisms that different from the description of classical diffusion law isrevealed by the experimental results, and the corresponding theoreticalanalysis is also made. The results indicate that the calculating results arein good agreement with the experimental data, and modified Fick's lawformulation can more really reflects the characteristics of rapid transientmass diffusion
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