What the study found
The study found that impact behavior into cohesionless granular media can remain qualitatively similar across different gravitational conditions when initial velocities are scaled using the Froude number, a dimensionless quantity that relates speed, gravity, and length scale.
Why the authors say this matters
The authors suggest this points to an underlying law for impact into granular media and indicate that Froude number scaling can unify impact trajectories across gravitational conditions within their stated assumptions.
What the researchers tested
The researchers used hundreds of soft-sphere discrete element simulations to examine surface impacts into cohesionless granular media under varying gravity. They also used granular dynamic resistive force theory to explain the observed behavior.
What worked and what didn't
Froude number scaling reportedly produced a precise collapse of impact trajectories across gravitational conditions within a set of assumptions. The abstract does not report cases where the scaling failed, beyond noting that the result is described within those assumptions.
What to keep in mind
The abstract states that the collapse is exact only within a set of assumptions, so the scope is limited to that framework. No additional limitations are described in the available summary.
Key points
- Impact behavior into cohesionless granular media stayed qualitatively similar across gravity levels when scaled by the Froude number.
- The authors describe the result as suggesting an underlying law for these impacts.
- Hundreds of soft-sphere discrete element simulations were used to test surface impacts under varying gravity.
- Granular dynamic resistive force theory was used to account for the observed universality.
- The abstract says the trajectory collapse is precise only within a set of assumptions.
Disclosure
- Research title:
- Froude scaling collapses granular impact trajectories across gravity
- Authors:
- Peter Miklavcic, E. N. Tokar, Esteban Wright, Paul Sánchez, Rachel Glade, Alice Quillen, Hesam Askari
- Institutions:
- University of Rochester, University of Maryland, College Park, University of Colorado Boulder, University of Colorado System
- Publication date:
- 2026-04-21
- OpenAlex record:
- View
- Image credit:
- Photo by SpaceX-Imagery on Pixabay · Pixabay License
Get the weekly research newsletter
Stay current with peer-reviewed research without reading academic papers — one filtered digest, every Friday.