English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The drag acting on an intruder in a three-dimensional frictionless drygranular environment is numerically studied. It is found the followings: (i)There is no yield force for the motion of the intruder without the gravity.(ii) The drag is proportional to the cross section of the moving intruder.(iii) If the intruder is larger than surrounding grains, the drag isproportional to the moving speed $V$ of the intruder for dense systems, but itexhibits a crossover from quadratic to linear dependences of the moving speedwhen the volume fraction of the surrounding grains is much lower than thejamming point. (iv) There is a plateau regime where the drag is almostindependent of $V$ if the size of the intruder is identical to those of theenvironmental grains and the volume fraction is near the jamming point.

Drag acting on an intruder in a three-dimensional granular environment