title: Volume fraction variations and dilation in colloids and granulars.
abstract: I discuss the importance of spatial and temporal variations in particle volume fraction to understanding the force response of concentrated colloidal suspensions and granular materials.
authors.affiliation: Chemical and Process Engineering, University of Strathclyde, Glasgow, UK. mark.haw@strath.ac.uk
authors.forename: M D
authors.initials: MD
authors.lastname: Haw