Campuses:

Hydrodynamics

Monday, March 26, 2018 - 2:00pm - 3:00pm
Michael Fogler (University of California, San Diego)
Electrons in pristine solids behave as a hydrodynamic fluid in a certain range of temperatures and frequencies. We show that the response of such a fluid to an electromagnetic field is different from what is predicted by the usual kinetic theory. Certain aspects of this response are universal, for example, a direct relation between the linear and second-order nonlinear optical conductivities. Graphene is a particularly interesting material where this physics can be studied. We show that two types of collective modes should exist therein.
Monday, March 26, 2018 - 4:00pm - 5:00pm
Alex Levchenko (University of Wisconsin, Madison)
We will review the Boltzmann-Langevin transport theory in general and its description of the Coulomb drag effect in clean double-layer systems in particular. Coulomb drag arises from density fluctuations with spatial scales of order of interlayer separation. At low temperatures, their characteristic frequencies exceed the intralayer equilibration rate of the electron liquid, and Coulomb drag may be treated in the collisionless approximation. As temperature is raised, the electron mean free path becomes short due to electron-electron scattering.
Tuesday, March 27, 2018 - 10:00am - 11:00am
Boris Narozhny (Karlsruhe Institute of Technology)
The last few years have seen an explosion of interest in hydrodynamic effects
in interacting electron systems in ultra-pure materials. In this talk I briefly
review the recent advances, both theoretical and experimental, in the
hydrodynamic approach to electronic transport, focusing on
viscous phenomena, non-local transport measurements, and
possibilities for observing nonlinear effects.
Wednesday, December 9, 2009 - 9:40am - 10:20am
Detlef Lohse (Universiteit Twente)
Keywords: inkjet printing, bubbles, drop formation, air entrainment, impact

Abstract:
Piezo-acoustic inkjet printing has become a mature technique for high performance printing. Nevertheless, there are still various scientific challenges. In this overview talk I will cover some of them:

(i) Coupling between the fluid dynamics and the acoustics, in particular when a disturbing bubble has been entrained in the ink channel.

(ii) Optical and acoustical monitoring of the bubble.
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