Fluid oscillations in a laboratory geyser with a bubble trap

Collective oscillations in bubble clouds

ZORANA ZERAVCIC†, DETLEF LOHSE AND WIM VAN SAARLOOS Instituut Lorentz, University of Leiden, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands Physics of Fluids Group, Mesa+ and Impact Research Institutes and Burgers Center for Fluid Dynamics, Department for Science and Technology, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands FOM Foundation, PO Box 3201, 3502 GA Utrecht, T...

Oscillations of a Fluid in a Channel

Location as a Poverty Trap

In this paper, we ask “Can proximity to towns reduces poverty in rural areas?” For this study we have mapped all the villages in Orissa. The study is based on small area poverty estimation methodology as well as the secondary data covering 47,395 villages and 109 towns. Our main findings are (i) there is a relationship between the distance to nearest town and rural poverty and (ii) poverty leve...

Self-sustained oscillations in a large magneto-optical trap.

We have observed self-sustained radial oscillations in a large magneto-optical trap, containing up to 10(10) Rb85 atoms. This instability is due to the competition between the confining force of the magneto-optical trap and the repulsive interaction associated with multiple scattering of light inside the cold atomic cloud. A simple analytical model allows us to formulate a criterion for the ins...

Simulation of a cusped bubble rising in a viscoelastic fluid with a new numerical method

We developed a new lattice Boltzmann method that allows the simulation of two-phase flow of viscoelastic liquid mixtures. We used this new method to simulate a bubble rising in a viscoelastic fluid and were able to reproduce the experimentally observed cusp at the trailing end of the bubble.  2000 Elsevier Science B.V. All rights reserved.