Saltation thresholds and entrainment of fine particles at Earth and Martian pressures

Details Saltation thresholds and entrainment of fine particles at Earth and Martian pressures Saltation thresholds and entrainment of fine particles at Earth and Martian pressures

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989stin...9014997l&link_type=abstract

Unknown

Other

Aeolian Tones, Atmospheric Pressure, Entrainment, Mars Atmosphere, Sediment Transport, Wind Tunnel Tests, Dust Storms, Fine Structure, Vacuum Chambers, Wind Velocity

Scientific paper

An open circuit wind tunnel designed to operate in a large vacuum chamber was built at NASA-Ames to investigate saltation threshold, flux, deflation rates, and other aeolian phenomena on the planet Mars. The vacuum chamber will operate at pressures as low as 4 mbar, and the tunnel operates at windspeeds as high as 150 m/sec. Either air or CO2 can be used as a working fluid. It was found that, to a first order approximation, the same dynamic pressure was required at Martian pressure to entrain or saltate particles as was required on Earth, although wind and particle speed are considerably higher at Martian pressure. A 2nd wind tunnel, designed to operate aboard the NASA KC-135 0-g aircraft to obtain information on the effect of gravity on saltation threshold and the interparticle force at 0-g, is also described and test data presented. Some of the experiments are summarized and various aspects of low pressure aeolian entrainment for particles 12 to 100 micron in diameter are discussed, some of them unique to low pressure testing and some common in Earth pressure particle transport testing. The facility, the modes of operation, and the materials used are described.

Affiliated with

Also associated with

No associations

Rating

Saltation thresholds and entrainment of fine particles at Earth and Martian pressures does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Saltation thresholds and entrainment of fine particles at Earth and Martian pressures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Saltation thresholds and entrainment of fine particles at Earth and Martian pressures will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1619071