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Updated: Apr 21, 2026

Challenges in Rheological Characterization of Highly Concentrated Suspensions — A Case Study for Screen-printing Silver Pastes
Published on: April 10, 2017
Shear viscosity and structural scalings in model adhesive hard-sphere gels
Aaron P R Eberle1, Nicos Martys2, Lionel Porcar3
1NIST Center for Neutron Research, Gaithersburg, Maryland 20899, USA and Center for Neutron Science and Department of Chemical & Biomolecular Engineering, University of Delaware, Newark, Delaware 19716, USA.
Abstract:
We present experiments and simulations that show a fundamental scaling for both the rheology and microstructure of flowing gels. Unique flow-SANS measurements demonstrate that the structure orients along both the neutral and compression axis. We quantify the anisotropy using a single parameter, α, that scales by a dimensionless number, M^{'}, that arises from a force balance on a particle. Simulations support the scalings and confirm the results are independent of the shape and range of the potential suggesting a universal for colloidal gels with short-ranged attractions.
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