Slow Coarsening in Jammed Athermal Soft Particle Suspensions (2019)
Journal Article
Chacko, R., Sollich, P., & Fielding, S. (2019). Slow Coarsening in Jammed Athermal Soft Particle Suspensions. Physical Review Letters, 123(10), Article 108001. https://doi.org/10.1103/physrevlett.123.108001

We simulate a densely jammed, athermal assembly of repulsive soft particles immersed in a solvent. Starting from an initial condition corresponding to a quench from a high temperature, we find nontrivial slow dynamics driven by a gradual release of s... Read More about Slow Coarsening in Jammed Athermal Soft Particle Suspensions.

Dynamic Vorticity Banding in Discontinuously Shear Thickening Suspensions (2018)
Journal Article
Chacko, R., Mari, R., Cates, M., & Fielding, S. (2018). Dynamic Vorticity Banding in Discontinuously Shear Thickening Suspensions. Physical Review Letters, 121(10), Article 108003. https://doi.org/10.1103/physrevlett.121.108003

It has recently been argued that steady-state vorticity bands cannot arise in shear thickening suspensions because the normal stress imbalance across the interface between the bands will set up particle migrations. In this Letter, we develop a simple... Read More about Dynamic Vorticity Banding in Discontinuously Shear Thickening Suspensions.

Shear Reversal in Dense Suspensions: The Challenge to Fabric Evolution Models from Simulation Data (2018)
Journal Article
Chacko, R. N., Mari, R., Fielding, S. M., & Cates, M. E. (2018). Shear Reversal in Dense Suspensions: The Challenge to Fabric Evolution Models from Simulation Data. Journal of Fluid Mechanics, 847, 700-734. https://doi.org/10.1017/jfm.2018.279

Dense suspensions of hard particles are important as industrial or environmental materials (e.g. fresh concrete, food, paint or mud). To date, most constitutive models developed to describe them are, explicitly or effectively, ‘fabric evolution model... Read More about Shear Reversal in Dense Suspensions: The Challenge to Fabric Evolution Models from Simulation Data.