TY - JOUR
T1 - Instability and spatiotemporal rheochaos in a shear-thickening fluid model
AU - Aradian, A
AU - Cates, M E
PY - 2005/5
Y1 - 2005/5
N2 - We model a shear-thickening fluid that combines a tendency to form inhomogeneous, shear-banded flows with a slow relaxational dynamics for fluid microstructure. The interplay between these factors gives rich dynamics, with periodic regimes ( oscillating bands, travelling bands, and more complex oscillations) and spatiotemporal rheochaos. These phenomena, arising from constitutive nonlinearity not inertia, can occur even when the steady-state flow curve is monotonic. Our model also shows rheochaos in a low-dimensional truncation where sharply defined shear bands cannot form.
AB - We model a shear-thickening fluid that combines a tendency to form inhomogeneous, shear-banded flows with a slow relaxational dynamics for fluid microstructure. The interplay between these factors gives rich dynamics, with periodic regimes ( oscillating bands, travelling bands, and more complex oscillations) and spatiotemporal rheochaos. These phenomena, arising from constitutive nonlinearity not inertia, can occur even when the steady-state flow curve is monotonic. Our model also shows rheochaos in a low-dimensional truncation where sharply defined shear bands cannot form.
U2 - 10.1209/epl/i2005-10011-9
DO - 10.1209/epl/i2005-10011-9
M3 - Article
VL - 70
SP - 397
EP - 403
JO - Europhysics Letters
JF - Europhysics Letters
SN - 0295-5075
IS - 3
ER -