Quantitative Rock Abrasion on Earth & Mars

 

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Research Log from 8/2/04 - 8/3/04

NASA ARC, Mountain View, CA


Abrasion Experiments for Laser Scanning

8/02/04 - 8/03/04, 8/10/04

 

Mean grain size: ~ 500 ?m
Wind speed: 11 m/s
Hopper Rate: 0.4 kg/minRocks (Plaster):
A- Hard
B- Soft, Homogeneous
C- Soft, Heterogeneous (wet, may have some drying loss)
D- Soft, Layered
E- Soft, Stressed (softest)
5- diatomaceous shale (From Guadeloupe) – small lavender

 

Run 1 (Aug. 2):
Total Time: 33 minutes
Total Sand: 13.43 kg
Rocks: A, B, E

 

Run 2 (Aug. 2):
Total Time: 36 minutes
Total Sand: 14.73 kg
Rocks: C, D, 5

 

Run 3 (Aug. 2):
Total Time: 34 minutes
Total Sand: 13.75 kg
Rocks: A, B, E

 

Run 4 (Aug. 3):
Total Time: 90 minutes
Total Sand: ~36 kg
Rocks: C, D, E

 

Run 5 (Aug. 3):
Total Time: 149 minutes
Total Sand: ~59.6 kg
Rocks: C, D, E

Run 6 (Aug. 3):
Total Time: 47 minutes
Total Sand: ~117.5 kg (Instead of Hopper, used a fertilizer spreader with a flux of 2.5 kg/min – setting #5)
Rocks: C, D, E, 5

Run 7 (Aug. 10):
Total Time: 63 minutes
Total Sand: ~157.5 kg (Instead of Hopper, used a fertilizer spreader with a flux of 2.5 kg/min – setting #5)
Rocks: C, E, 5, D (In order from right to left when facing the hopper)

 

Images and Scans: (click to enlarge)
Scan ScanScan


Charts from the data recorded:



Cumalative Sand Expended vs. Mass Loss
Click on Chart to Enlarge

Cumalative Sand Expended vs. Mass Loss
Click on Chart to Enlarge

QTVR Panoramas of Wind-tunnel Experiments:

Wind Tunnel Outside View Wind-Tunnel View During Abrasion Experiments
High Resolution (3 MB)
Low Resolution (500K)
Wind Tunnel Inside View Wind-Tunnel Inside View
High Resolution (3 MB)
Low Resolution (500K)

 

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