Gravitational compression of colloidal gels.
Eur Phys J E Soft Matter
; 28(2): 159-64, 2009 Feb.
Article
in En
| MEDLINE
| ID: mdl-19018579
ABSTRACT
We study the compression of depletion gels under the influence of a gravitational stress by monitoring the time evolution of the gel interface and the local volume fraction, φ, inside the gel. We find φ is not constant throughout the gel. Instead, there is a volume fraction gradient that develops and grows along the gel height as the compression process proceeds. Our results are correctly described by a non-linear poroelastic model that explicitly incorporates the φ-dependence of the gravitational, elastic and viscous stresses acting on the gel.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Eur Phys J E Soft Matter
Year:
2009
Document type:
Article