Granular media

Granular media are materials composed of separate macroscopic grains that interact together mainly through friction. This covers a lot of day to day materials: sand, cereals, rice, stones etc. They have a lot of very peculiar properties.

Sand dunes (Australia)
Sand dunes (Australia)

Fossil dunes in Kings Canyon (central Australia)
Fossil dunes in Kings Canyon (central Australia)

Sand heaps in construction site
Sand heaps in construction site

Pile of candies
Pile of candies

Antlion sand trap
Antlion sand trap

Pile of logs
Pile of logs

Pile of coral sand segregated by size
Pile of coral sand segregated by size

Microscopic image of 500 microns glass beads
Microscopic image of 500 microns glass beads