© 2011, CISM, Udine. Stability of electrohydrodynamic flows is essential to a variety of applications ranging from electrokinetic assays to electro-spray ionization. In this series of lecture notes, a few basic concepts of electrohydrodynamic stability are illustrated using two model problems, electrokinetic mixing flow and electrohydrodynamic cone-jet, respectively wall-bounded and free surface flow. After a review of the governing equations, spatiotemporal analysis of the two example problems is presented using linearized bulk- or surface-coupled models. The operating regimes for these flows are discussed within the framework of electrohydrodynamic stability.
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