Title

Modeling the Formation of Sand Ripples: Gone with the Wind

Faculty Mentor(s)

Dr. Tim Pennings, Hope College

Document Type

Poster

Event Date

4-13-2012

Abstract

Why does a wind blowing over a sandy surface establish ripples of uniform size, shape, and separation, rather than leveling the surface? Previous models, motivated by wind tunnel observations, have explained this by relying on the accumulation of saltating sand particles. Observing sand in its natural environment; however, indicates otherwise. Our model explains the formation of these ripples based only on reptating sand particles. The results of this model call into question the validity of these previous models.

Comments

This research was supported by the NSF #0645887.

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