Abstract
The observation of localized stationary structures, coined oscillons, in granular media has evoked much interest. By parametric excitation of clay suspensions, we demonstrate a hysteretic transition to oscillon-type states in a nongranular medium. When the symmetry of up-down reflection + time translation is lost, these states undergo a transition to propagating localized states previously seen in Newtonian fluids. These observations are in accord with recent theoretical predictions of sufficient conditions for oscillon formation. In addition, a novel measurement technique for the effective suspension viscosity demonstrates their shear-thinning properties. 1999
Original language | American English |
---|---|
Pages (from-to) | 3190-3193 |
Number of pages | 4 |
Journal | Physical Review Letters |
Volume | 83 |
Issue number | 16 |
DOIs | |
State | Published - 18 Oct 1999 |