Chemical Engineering
Sand pours like a liquid, holds a slope like a solid, and can jam a steel silo so completely that the cure is a hammer
18 Sept 2026 · 11 min read
Granular material is neither solid nor liquid, and the physics describing it is genuinely unfinished. That is why silos arch, why a blended powder un-mixes on the way to the machine, and why powders stop flowing altogether once the particles get small enough.
Read more →
