Session MN: Micro Fluids VI

8:00 AM–10:10 AM, Tuesday, November 25, 2008
Room: 201

Chair: Jonathan Posner, Arizona State University

Abstract ID: BAPS.2008.DFD.MN.4

Abstract: MN.00004 : Intrinsically Pulsating Electrohydrodynamic Cone-Jets

8:39 AM–8:52 AM

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Authors:

  Menghan Chiang
    (Duke University)

  Shenren Xu
    (Duke University)

  Chuan-Hua Chen
    (Duke University)

When the flow rate of an electrohydrodynamic cone-jet is self-regulated, the jet typically pulsates intrinsically due to the imbalance between the liquid supplied to the cone and that discharged through the jet. We used high-speed microscopic imaging and oscilloscopic current measurements to characterize these intrinsic pulsations. The measured kHz-range pulsation frequency compares favorably to a model we developed drawing an analogy between pulsating cone-jet on a supported meniscus and that on an isolated charged drop. The scaling law is expected to be applicable to electrohydrodynamic drop formation and miniaturized electrospray systems.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2008.DFD.MN.4