Bulk electroconvection in electrolyte Academic Article uri icon


  • Received 25 May 2005; published 1 December 2005Bulk electroconvection pertains to flow induced by the action of the mean electric field upon the residualspace charge in the macroscopic regions of a locally quasielectroneutral strong electrolyte. There existed a longtime controversy in the literature as to whether quiescent electric conduction from such an electrolyte into auniform charge selective solid, such as a metal electrode or an ion exchange membrane, is stable with respectto bulk electroconvection and whether bulk electroconvection at a nonuniform solid of this type may developinto a fully fledged flow. Numerical results reported in this paper confirm previous conclusions of a linearstability analysis concerning the nonexistence of bulk electroconvective instability, while we suggest that bulkelectroconvection at a nonuniform charge selective solid results in a fully fledge flow on the length scale ofnonuniformity of the surface.DOI: 10.1103/PhysRevE.72.061502 PACS number s : 82.45.Gj, 47.20.Ma, 82.39.Wj, 82.45.Mp

publication date

  • January 1, 2005