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达肯方程的推导过程 | 小蜗熊的蜂蜜罐 #2

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kb1000fx opened this issue Oct 26, 2019 · 0 comments
Open

达肯方程的推导过程 | 小蜗熊的蜂蜜罐 #2

kb1000fx opened this issue Oct 26, 2019 · 0 comments

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@kb1000fx
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https://garybear.cn/t-38683/

简介达肯方程描述柯肯达尔效应的一个方程,是将物质的扩散和对流全部按照扩散的形式来表示,其思路类似于全电流定律。 推导过程假设存在一个AB两组分组成的一维扩散偶,考虑对流的因素根据扩散第一定律,对于成分A $$J_A=J’_A + C_A \cdot v = -D_A \cdot \frac{\partial C_A}{\partial x} + C_A \cdot v \tag{1}$$ 取其中

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