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cgch

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[交流] 探讨流动电势的问题

多孔介质存在于电解质溶液中,介质表面带电,会有EDL的概念。宏观体系两端加press
ure gradient,产生流动,EDL内部的净电荷也流动,产生streming current(Is),因
为介质是个closed system,流动的净电荷在两端造成电荷累计,会形成一个streaming
potential,从而形成conductive current (Ic),其流动方向与宏观pressure grad
ient的方向相反,电流为零,Is+Ic=0。

我的问题是:这个诱发的流动电势,所对应的电场是稳恒电场吗?也就是说是否满足拉普拉斯方程,即电势的二阶微分为零?
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