43 citations · 150 across the 13 of their papers we have counts for
13 papers
Impacts and Ejecta in Natural Granular Material
Esteban Wright, Emau Argueta, Wolfgang Losert
With laboratory experiments we investigate the ejecta of low-velocity (~m/s) impacts into multi-scale granular media and compare them against ejecta from impacts into mono-scale me…
Subsurface pulse, crater and ejecta asymmetry from oblique impacts into granular media
Bingcheng Suo, A. C. Quillen, Max Neiderbach +9
We carry out experiments of 104 m/s velocity oblique impacts into a granular medium (sand). Impact craters have nearly round rims even at a grazing angle of about , howev…
Froude number scaling unifies impact trajectories into granular media across gravitational conditions
Peter M. Miklavcic, Ethan Tokar, Esteban Wright +4
The interactions of solid objects with granular media is countered by a resistance force that stems from frictional forces between the grains and the media's resistance to inertia…
Surface particle motions excited by a low velocity normal impact into a granular medium
Max Neiderbach, Bingcheng Suo, Esteban Wright +5
In laboratory experiments, high speed videos are used to detect and track mm-size surface particle motions caused by a low velocity normal impact into sand. Outside the final crate…
Sub-surface granular dynamics in the context of oblique, low-velocity impacts into angular granular media
Peter M. Miklavčič, Hesam Askari, Paul Sánchez +2
Oblique, low-velocity impacts onto extraterrestrial terrain are an inevitable occurrence during space exploration. We conduct two-dimensional discrete simulations to model such imp…
Propagation and attenuation of pulses driven by low velocity normal impacts in granular media
A. C. Quillen, Max Neiderbach, Bingcheng Suo +7
We carry out experiments of low velocity normal impacts into granular materials that fill an approximately cylindrical 42 litre tub. Motions in the granular medium are tracked with…
Ricochets on Asteroids II: Sensitivity of laboratory experiments of low velocity grazing impacts on substrate grain size
Esteban Wright, Alice C. Quillen, Paul Sanchez +4
We compare low velocity impacts that ricochet with the same impact velocity and impact angle into granular media with similar bulk density, porosity and friction coefficient but di…
Metachronal waves in concentrations of swimming Turbatrix aceti nematodes and an oscillator chain model for their coordinated motions
A. C. Quillen, A. Peshkov, Esteban Wright +1
At high concentration, free swimming nematodes known as vinegar eels ({\it Turbatrix aceti}), collectively exhibit metachronal waves near a boundary. We find that the frequency of…
Accretion of Ornamental Equatorial Ridges on Pan, Atlas and Daphnis
Alice C. Quillen, Fatima Zaidouni, Miki Nakajima +1
We explore scenarios for the accretion of ornamental ridges on Saturn's moons Pan, Atlas, and Daphnis from material in Saturn's rings. Accretion of complex shaped ridges from ring…
Ricochets on Asteroids: Experimental study of low velocity grazing impacts into granular media
Esteban Wright, Alice Quillen, Juiliana South +6
Spin off events and impacts can eject boulders from an asteroid surface and rubble pile asteroids can accumulate from debris following a collision between large asteroids. These pr…
Excitation of Tumbling in Phobos and Deimos
Alice C. Quillen, Mckenzie Lane, Miki Nakajima +1
Mass-spring model simulations are used to investigate past spin states of a viscoelastic Phobos and Deimos. From an initially tidally locked state, we find crossing of a spin-orbit…
Boulder Stranding in Ejecta Launched by an Impact Generated Seismic Pulse
Esteban Wright, Alice C. Quillen, Juliana South +6
We consider how an impact generated seismic pulse affects the surface of an asteroid distant from the impact site. With laboratory experiments on dry polydisperse gravel mixtures,…
A Light-weight Vibrational Motor Powered Recoil Robot that Hops Rapidly Across Granular Media
Alice C. Quillen, Randal C. Nelson, Hesam Askari +3
A 1 cm coin vibrational motor fixed to the center of a 4 cm square foam platform moves rapidly across granular media (poppy seeds, millet, corn meal) at a speed of up to 30 cm/s, o…