5 papers
Rheological Behavior of Colloidal Silica Dispersion: Irreversible Aging and Thixotropy
Vivek Kumar, Yogesh M. Joshi
In this work, we study the rheological behavior of colloidal dispersion of charge-screened nanoparticles of silica suspended in aqueous media that exhibits soft solid-like consiste…
Plastic or Viscous? A Reappraisal of Yielding in Soft Matter
Yogesh M. Joshi, Alexander Ya. Malkin
Many soft jammed materials, such as pastes, gels, concentrated emulsions, and suspensions, possess a threshold stress, known as yield stress, that must be exceeded to cause permane…
Thermal History Asymmetry and Dissipation in Dense Colloidal Microgel Glasses
Sonali Vasant Kawale, Yogesh M Joshi, Ranjini Bandyopadhyay
Microstructurally arrested matter, from molecular glasses to soft glassy materials, can retain a memory of their thermal or mechanical (shear) histories. Their history-dependent an…
Nano-silica based Aqueous Colloidal Gels as Eco-friendly Thixotropic Lubricant
Arun Kumar, Vivek Kumar, Yogesh M. Joshi +1
The environmental risks posed by traditional oil and grease-based lubricants can be significantly mitigated by adopting water-based alternatives engineered with superior rheologica…
Shear Stress Build-up Under Constant Strain Conditions in Soft Glassy Materials
Vivek Kumar, Gareth H McKinley, Yogesh M Joshi
In this work, we investigate the transient rheological behavior of two soft glassy materials: a clay dispersion and a silica gel, emphasizing their unconventional shear stress buil…