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SUMMARY:Electrohydrodynamic control of multi-fluid systems at small scales
  - Dr Radu Cimpeanu\, Imperial College London
DTSTART:20170216T113000Z
DTEND:20170216T123000Z
UID:TALK69560@talks.cam.ac.uk
CONTACT:Catherine Pearson
DESCRIPTION:With sizes not exceeding a few centimetres and usage ranging f
 rom blood sample analysis to cooling devices and integrated circuit compon
 ents (and far beyond)\, liquid systems at small scales play an indispensab
 le part in our lives. Their production and maintenance however is a highly
  sensitive and expensive process. This body of research focuses on elimina
 ting these drawbacks by creating efficient mechanisms that do not use any 
 moving parts and do not require the presence of an oncoming flow. \n\nWe a
 nalyse electrostatic control procedures in simple geometrical configuratio
 ns\, such as channels containing layers of immiscible fluids. Stability th
 eory guides the imposition of voltage distributions that efficiently manip
 ulate the fluid-fluid interface and harness the classical instabilities ar
 ising in such systems. We then formulate nonlinear asymptotic models that 
 enable the study of the interfacial motion far beyond the level of small p
 erturbations. Finally\, we implement state-of-the-art computational tools 
 based on the volume-of-fluid method in both two- and three-dimensional con
 texts to steer these arguments towards practical applications involving mi
 crofluidic mixing\, pumping and directed polymer assembly.
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3 0EZ
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