5 papers
On the testing of grain shape corrections to bedload transport equations with grain-resolved numerical simulations
Yulan Chen, Orencio Durán, Thomas Pähtz
Using grain-resolved LES-DEM simulations, Zhang et al. (J. Geophys. Res. Earth Surf. 130, e2024JF007937, 2025) aimed to validate a grain-shape-corrected bedload transport equation…
Coarse-graining particulate two-phase flow
Thomas Pähtz, Yulan Chen, Rui Zhu +2
To acquire the ability to numerically study the rheology of particulate two-phase flows that lack scale separation, we present a general method to average or coarse-grain the equat…
Coevolving aerodynamic and impact ripples on Earth
Hezi Yizhaq, Katharina Tholen, Lior Saban +11
Windblown sand creates multiscale bedforms on Earth, Mars, and other planetary bodies. According to conventional wisdom, decameter-scale dunes and decimeter-scale ripples emerge vi…
Unified Flow Rule of Undeveloped and Fully Developed Dense Granular Flows Down Rough Inclines
Yanbin Wu, Thomas Pähtz, Zixiao Guo +3
We report on chute measurements of the free-surface velocity in dense flows of spheres and diverse sands and spheres-sand mixtures down rough inclines. These and previous measu…
Effects of particle elongation on dense granular flows down a rough inclined plane
Jixiong Liu, Lu Jing, Thomas Pähtz +3
Granular materials in nature are nearly always non-spherical, but particle shape effects in granular flow remain largely elusive. This study uses discrete element method simulation…