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Updated: May 8, 2026
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High Throughput Analysis of Liquid Droplet Impacts
Published on: March 6, 2020
Impact of granular drops
J O Marston1, M M Mansoor, S T Thoroddsen
1Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia.
Summary
We studied how wet sand drops spread and splash upon hitting a surface. The drop
Area of Science:
- Physics
- Fluid Dynamics
- Materials Science
Background:
- Granular materials exhibit complex behaviors distinct from continuous fluids.
- Understanding granular drop impact is crucial for various industrial and natural processes.
Purpose of the Study:
- To investigate the dynamics of granular drop impact.
- To quantify the spreading and splashing phenomena of sand-water mixtures.
Main Methods:
- Formation of granular drops using sand and water as a binder.
- Experimental measurement of spread diameter and impact speeds.
- Analysis of ejected grain velocities during splashing.
Main Results:
- The normalized spread diameter (d/D) follows a power-law relationship with impact parameters: (tV/D)(1/2).
- Ejected grain speeds during splashing are typically less than twice the initial impact speed.
Conclusions:
- The spreading of granular drops is predictable under specific impact conditions.
- Splashing dynamics are constrained, with ejected particles not significantly exceeding impact velocities.
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