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Updated: May 27, 2026
07:47
Experimental Protocol to Investigate Particle Aerosolization of a Product Under Abrasion and Under Environmental Weathering
Published on: September 16, 2016
Abrasion of yardangs.
Zhen-Ting Wang1, Hong-Tao Wang, Qing-He Niu
1Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China. wang_zhen_ting00@sohu.com
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|November 9, 2011
Summary
A new abrasion number (An) quantifies sand grain impacts on yardangs. This model helps estimate erosion rates and reconstruct past wind activity in arid regions, including Mars.
Area of Science:
- Geology
- Geomorphology
- Planetary Science
Background:
- Yardangs are wind-eroded rock formations found in arid environments.
- Understanding aeolian abrasion is crucial for interpreting geological records and planetary surface evolution.
Purpose of the Study:
- To develop a mechanical model for sand grain-yardang collisions.
- To introduce a new parameter, the abrasion number (An), as a similarity criterion for abrasion experiments.
- To assess the model's applicability to natural conditions and estimate yardang abrasion rates.
Main Methods:
- Classical mechanics principles applied to model sand grain-yardang impacts.
- Derivation of the dimensionless abrasion number (An).
- Analysis of yardang abrasion rates in the Qaidam Basin, China (1986-2010).
Main Results:
- The volume of material removed per impact is proportional to the abrasion number (An).
- An incorporates target material properties like Young's modulus and yield stress.
- Yardang abrasion rates in the Qaidam Basin range from 0.011-0.398 mm/yr.
- Significant abrasion events correlate with strong wind conditions.
Conclusions:
- The abrasion number (An) serves as a robust similarity criterion for abrasion studies.
- The model accurately estimates natural yardang erosion rates.
- This research aids in reconstructing aeolian activity history from yardang morphology, with implications for Mars exploration.
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