Electrohydrodynamic instability of a charged membrane

V. Kumaran
Phys. Rev. E 64, 011911 – Published 21 June 2001
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Abstract

The stability of shape fluctuations of a flat charged membrane immersed in a fluid is analyzed using a linear stability analysis. A displacement of the membrane surface causes a fluctuation in the conterion density at the surface. This in turn causes an additional contribution to the force density in the momentum equation for the fluid, which results in a normal stress at the surface which is opposite in direction to the stress caused by surface tension. This electrohydrodynamic effect destabilizes fluctuations when the surface potential exceeds a critical value.

  • Received 19 October 2000

DOI:https://doi.org/10.1103/PhysRevE.64.011911

©2001 American Physical Society

Authors & Affiliations

V. Kumaran

  • Department of Chemical Engineering, Indian Institute of Science, Bangalore 560 012, India

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Vol. 64, Iss. 1 — July 2001

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