Levich Institute Seminar Announcement, 11/12/2013
Tuesday, 11/12/2013
2:00 PM
Steinman Hall, Room #312
(Chemical Engineering Conference Room)

Thomas Leary
City College of CUNY
Levich Institute

"Dielectrophoretic Motion of Coalescing Water Droplets to Measure Hydrodynamic Slip in a Microchannel"


We present a measurement of hydrodynamic slip at a mineral oil/PDMS interface. Pairs of surfactant-stabilized water droplets are formed in oil via microfluidic flow focusing and coalesce in a uniform electric field. The slip coefficients obtained by modeling the dielectrophoretic motion of the droplets as a balance between the attractive electrostatic and resistive Stokes hydrodynamic forces suggest that the high porosity and air solubility of the PDMS elastomer that composes the microchannel surface, together with its hydrophobic nature, play an important role in microfluidic flows.


Mr. Thomas Leary is currently a Ph.D. student in Chemical Engineering under the supervision of Professor Charles Maldarelli

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