Cataphoresis in electric arcs
Cataphoresis in electric arcs
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DOI：
10.1088/0022-3727/31/23/012
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发表时间：
1998-12-07
影响因子：
3.4
通讯作者：
Murphy, AB
中科院分区：
文献类型：
--
作者：
Murphy, AB
采用二维数值模型研究了大气压下氩气、氦气、氢气、氮气和氧气混合气体中自由燃烧电弧的电泳现象。提出了在扩散与分层的联合扩散系数处理中考虑电场效应的方法。电泳被发现导致大的增加，在阳极附近的氦浓度在氩氦弧和较小的减少，在轴附近的氢浓度在氩氢弧。在氩氮和氩氧电弧中没有明显的影响。电泳对其他电弧特性的影响一般很小，只有在氩氦电弧中才有意义。
A two-dimensional numerical model is used to investigate cataphoresis (demixing driven by electrical fields) in free-burning arcs in mixtures of argon with helium, hydrogen, nitrogen and oxygen at atmospheric pressure. The method of inclusion of electrical field effects in the combined diffusion coefficient treatment of diffusion and demixing is presented. Cataphoresis is found to lead to large increases in helium concentration near the anode in argon-helium arcs and smaller decreases in hydrogen concentration near the axis in argon-hydrogen arcs. There is no significant effect in argon-nitrogen and argon-oxygen arcs. The effects of cataphoresis on other are properties are generally small and are significant only in argon-helium arcs.