We love interactions, in particular with particles
Mixing stuff in very viscous fluids, or better said: at low Reynolds number, is not easy. Here is a microfluidics tool that allows one to do so anyway. It uses a simple small magnet aka stirring bar in a small chamber.
M.J. Workamp, V. Saggiomo, J.A. Dijksman — Journal of Micromechanics and Microengineering 25 (2015)
Resolving the rub in lubricated soft solid friction…
David M. Walker, Antoinette Tordesillas, Jie Ren, Joshua A. Dijksman, Robert P. Behringer — EPL 107 (2014)
R.P. Behringer, D. Bi, B. Chakraborty, A. Clark, J. Dijksman, J. Ren, J. Zhang — Journal of Statistical Mechanics: Theory and Experiment 2014 (2014)
It doesn’t look like much, but here is where the particle Gods live. Visiting IUSTI Marseille.
+++ recommended
Geert H. Wortel, Joshua A. Dijksman, Martin Van Hecke — Physical Review E – Statistical, Nonlinear, and Soft Matter Physics 89 (2014)
H. Zheng, J.A. Dijksman, R.P. Behringer — Europhysics Letters 107 (2014)
POV-Ray on experimental data of diffusion in granular flows never ceases to amaze. This video shows reconstructed laser-sheet imaging data from a so-called split-bottom shear experiment. The color indicates the angular velocity of the particles.
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