Solidification of colloidal suspensions

SSL Peppin, JAW Elliott, MG Worster - Journal of Fluid Mechanics, 2006 - cambridge.org
We present a mathematical model of the unidirectional solidification of a suspension of hard-
sphere colloids. Similarity solutions are obtained for the volume fraction and temperature …

The physics of frost heave and ice‐lens growth

SSL Peppin, RW Style - Vadose Zone Journal, 2013 - Wiley Online Library
The principle cause of frost heave is the formation of segregated ice—ice lenses—in
freezing soil columns. Despite much experimental and theoretical work, there remain many …

Experimental verification of morphological instability in freezing aqueous colloidal suspensions

SSL Peppin, JS Wettlaufer, MG Worster - Physical review letters, 2008 - APS
We describe an experimental test of a new theory of the unidirectional freezing of aqueous
colloidal suspensions. At low freezing speeds a planar ice lens completely rejects the …

Ice-lens formation and geometrical supercooling in soils and other colloidal materials

RW Style, SSL Peppin, ACF Cocks, JS Wettlaufer - Physical Review E, 2011 - APS
We present a physically intuitive model of ice-lens formation and growth during the freezing
of soils and other dense, particulate suspensions. Motivated by experimental evidence, we …

Morphological instability in freezing colloidal suspensions

SSL Peppin, MG Worster… - Proceedings of the …, 2007 - royalsocietypublishing.org
We present a linear stability analysis of a planar ice interface during unidirectional
solidification of a hard-sphere colloidal suspension. We find that the interface can become …

[HTML][HTML] The effect of improved rural sanitation on diarrhoea and helminth infection: design of a cluster-randomized trial in Orissa, India

…, JHJ Ensink, M Bell, MC Freeman, S Peppin… - Emerging themes in …, 2012 - Springer
Background Infectious diseases associated with poor sanitation such as diarrhoea, intestinal
worms, trachoma and lymphatic filariasis continue to cause a large disease burden in low …

The kinetics of ice-lens growth in porous media

RW Style, SSL Peppin - Journal of fluid mechanics, 2012 - cambridge.org
We analyse the growth rate of segregated ice (ice lenses) in freezing porous media. For
typical colloidal materials such as soils we show that the commonly employed Clapeyron …

Crust formation in drying colloidal suspensions

RW Style, SSL Peppin - Proceedings of the Royal Society …, 2011 - royalsocietypublishing.org
During the drying of colloidal suspensions, the desiccation process causes the suspension
near the air interface to consolidate into a connected porous matrix or crust. Fluid transport …

Steady-state solidification of aqueous ammonium chloride

SSL Peppin, HE Huppert, MG Worster - Journal of Fluid Mechanics, 2008 - cambridge.org
We report on a series of experiments in which a Hele-Shaw cell containing aqueous
solutions of NH4Cl was translated at prescribed rates through a steady temperature …

Pressure and relative motion in colloidal suspensions

SSL Peppin, JAW Elliott, MG Worster - Physics of Fluids, 2005 - pubs.aip.org
We examine the nature of relative motion in colloidal suspensions. By distinguishing
carefully between the thermodynamic pressure of a mixture, defined by Gibbs, and the …