摘要
从液体似晶结构的“格子”理论出发,推导了有外场存在情况下溶液溶质扩散转移的动力学方程。通过与 Fick 定律形式比较,得到了有外场作用的溶液溶质扩散系数表达式,由此讨论了强化扩散传质过程中外场与化学势场的协同关系,即溶液溶质扩散传质流的大小不仅与各场强度量梯度的大小及系统的物性有关,还与外场同化学势场的配合有关。进一步分析得到:外场的引入之所以能够强化和控制溶液溶质扩散,其本质是外场的引入可对溶液的粘度产生影响,关于这一论点可由文献 [7] 的实验研究所证实,并与本文的理论研究结果一致。
There existing out-fields in the solution, the dynamic equation of solute diffuseness in the solution is deduced from the lattice theory of liquid quasi-crystalline structure. Comparing the dynamic equation of solute diffuseness with Fick law, the expression of solute diffuseness in the solution is drawn under the conditions of out- fields' action. The synergism between out-fields and the chemical potential field is discussed on the enhanced diffusion mass-transfer. The magnitude of the flux of solute diffuseness in the solution relates not only to the magnitudes of the fields' intensive quantity gradient and physical property but also to the cooperation of out-fields and the chemical potential field. The out-fields being able to enhance and control the solute diffuseness in the solution is essentially that the out-fields influence on the solution viscidity.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2004年第6期28-31,共4页
Journal of North China Electric Power University：Natural Science Edition
基金
国家重点基础研究发展规划资助项目(G2000026307)
广西师范大学博士科学研究启动基金资助项目.
关键词
化工过程
溶液
溶质扩散
协同强化作用
solute diffuseness
fields synergism
quasi-crystalline structure
out-fields
