In Nature this week: Carried away – How grain shape affects fluid transport of sediment. Read more and browse the full issue:
The flow of sediment across deserts, through rivers or along coasts transports vast quantities of granular material over huge distances. Understanding the mechanics of this movement has a wide range of applications including river and coastal restoration, pollution mitigation and even understanding past and present climates on other worlds. But developing accurate models for sediment transport has proved challenging.
In this week’s issue,reveal that although many models consider grain size, grain shape also exerts a significant influence on sediment movement and might account for differences between previous models and measurements. The researchers have developed a theory that accounts for the effects of grain shape on drag and friction.
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