ELECTROHYDRODYNAMICS: The Taylor-Melcher Leaky Dielectric Model

  • D. A. Saville
    Department of Chemical Engineering, Princeton University, Princeton, New Jersey 08544

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<jats:p> ▪ Abstract  Electrohydrodynamics deals with fluid motion induced by electric fields. In the mid 1960s GI Taylor introduced the leaky dielectric model to explain the behavior of droplets deformed by a steady field, and JR Melcher used it extensively to develop electrohydrodynamics. This review deals with the foundations of the leaky dielectric model and experimental tests designed to probe its usefulness. Although the early experimental studies supported the qualitative features of the model, quantitative agreement was poor. Recent studies are in better agreement with the theory. Even though the model was originally intended to deal with sharp interfaces, contemporary studies with suspensions also agree with the theory. Clearly the leaky dielectric model is more general than originally envisioned. </jats:p>

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