Flows on surfaces

Thursday, October 15, 2009 - 1:30pm - 2:10pm
Oliver Harlen (University of Leeds)
Keywords: dilute polymer solutions, FENE model, free surface flows, Finite

Abstract: The effects of polymer additives on the break-up of jets in continuous (CIJ)
and drop on demand (DOD) inkjet printing are considered. In continuous
inkjet printing the fluid jet is modulated at close to the Rayleigh
frequency to produce a steady stream of uniform drops, while in drop on
demand printing individual drops are generated by applying an impulse to the
Monday, October 12, 2009 - 2:45pm - 3:25pm
Matteo Pasquali (Rice University)
Flows with free surfaces and free boundaries arise in many industrial and biological applications. Examples are coating, polymer processing, ink-jet printing, DNA arrays, spraying, deformation of blood cells, blood flow in arteries and capillaries, and flow in the deep pulmonary alveoli. Most of these flows have two distinguishing features: (1) the fluid is complex (microstructured ); thus, the stress includes a visco-elastic term which is important and sometimes dominant, and (2) the surface forces are comparable to the viscous and elastic ones.
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