J
James D. Iversen
Researcher at Iowa State University
Publications - 66
Citations - 3671
James D. Iversen is an academic researcher from Iowa State University. The author has contributed to research in topics: Wind tunnel & Saltation (geology). The author has an hindex of 28, co-authored 66 publications receiving 3495 citations.
Papers
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Journal ArticleDOI
Saltation threshold on Earth, Mars and Venus
James D. Iversen,B. R. White +1 more
TL;DR: In this paper, a low-air-density wind tunnel was used to extend the range of previous investigations and to separate the effects of Reynolds number and interparticle forces of cohesion.
Book
Wind as a Geological Process: On Earth, Mars, Venus and Titan
Ronald Greeley,James D. Iversen +1 more
TL;DR: In this article, the authors give an account of geological aspects of windblown material, and show how we can gain better understanding of the Earth through comparative planetology through comparative geography.
Journal ArticleDOI
Threshold windspeeds for sand on Mars: Wind tunnel simulations
TL;DR: In this paper, the relationship between friction threshold speeds and free-stream velocity was extended to the critical case for Mars of momentum thickness Reynolds numbers between 425 and 2000, and it was determined that the dynamic pressure required to initiate saltation is nearly constant for pressures between 1 bar and 4 mb for atmospheres of both air and CO2.
Journal ArticleDOI
Saltation threshold on Mars: The effect of interparticle force, surface roughness, and low atmospheric density
TL;DR: In this article, the threshold speeds of particles with different densities were determined as a function of particle diameter and in terms of threshold parameter vs. particle friction Reynolds number in wind-tunnel experiments performed to determine the threshold friction speed of particles.