Propagating transitions of electroconvection.
Propagating transitions of electroconvection.
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电对流的传播转变。
DOI：
10.1103/physreva.31.2548
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
Suzuki
中科院分区：
文献类型：
--
作者：
Suzuki
在薄的介质液体层中，在垂直电场作用下，通过向液体注入电荷可以产生电对流。当给出对流开始的临界条件的参数在临界点上迅速增加到某一值时，系统将出现从静止状态到对流状态的传播转变。我们试图用两个不同的模型来展示这样的传播跃迁。采用Newell和Whitehead的振幅方程方法对自由-自由边界的双极注入型进行了分析，对刚-刚边界单极注入型进行了数值分析。这两种情况都显示出一定速度的对流态的传播跃迁。
In a thin dielectric liquid layer, electroconvection can be generated by means of charge injection to the liquid under a vertical electric field. When a parameter which gives the critical condition of the onset of convection is rapidly increased up to some value across the critical point, a propagating transition of the system from the quiescent state to the convecting state is expected to appear. We have tried to show such propagating transitions in two different models. One for a bipolar-injection type with free-free boundaries was analyzed with use of the amplitude-equation approach of Newell and Whitehead, and the other for a unipolar-injection type with rigid-rigid boundaries was numerically analyzed. Both cases have shown propagating transitions of convecting state with definite velocities.