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Descripción
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| Drops of a conducting fluid in electrowetting devices tend to spread when a difference of potential V0 is set between the drop and an electrode external to it. The classical Lippmann's theory predicts unlimited spreading, with a decrease of the contact angle between drop and solid substrate, as one increases V0. This fact is in contradiction with current experiments, where saturation of the contact angle to a limiting value is found. A further increase of V0 does not lead to further spreading but to the appearance of instabilities in the form of emitted drops at the contact line. We provide an explanation to these two related phenomena based solely on interfacial and electrostatic energies. A local analysis close to the contact line is also provided and an expression for the most unstable mode is deduced. | |
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Internacional
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Si |
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JCR del ISI
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Si |
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Título de la revista
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QUARTERLY JOURNAL OF MECHANICS AND APPLIED MATHEMATICS |
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ISSN
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0033-5614 |
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Factor de impacto JCR
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1,125 |
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Información de impacto
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Volumen
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62 |
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DOI
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10.1093/qjmam/hbp016 |
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Número de revista
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4 |
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Desde la página
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465 |
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Hasta la página
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480 |
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Mes
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NOVIEMBRE |
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Ranking
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