Other
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sa22a11s&link_type=abstract
American Geophysical Union, Spring Meeting 2001, abstract #SA22A-11
Other
0340 Middle Atmosphere--Composition And Chemistry, 0394 Instruments And Techniques
Scientific paper
Detailed studies of noctilucent clouds, polar mesosphere summer echoes, and other layered phenomena require the in situ detection of mesospheric particles. Nose-mounted, open cup detectors are frequently used in rocket-borne measurements of mesospheric dust. The blunt geometry of these probes and the supersonic flight speed create a shock of heated, compressed air directly upstream of the probe entrance. This shock region alters the incident dust during transit. The probes also have interior mesh-like electrodes held at constant voltages. We have performed computer simulations which track the trajectory, temperature, and mass of incident dust grains. We have considered the effects of gas drag forces, electric forces, viscous gas heating, and mass loss due to sublimation. Monte Carlo simulations have determined the flow around and into the cup. Electric fields are calculated by relaxation techniques. We apply these simulations to dust detectors flown during the DROPPS campaign in 1999, addressing layered phenomena in the summer mesopause region. We simulate both ice and meteoritic dust grains with zero, one, and two elementary charges of both signs. Preliminary calculations show the trajectory of the grains to be significantly influenced. We will present calculations that estimate the lower bound for the smallest detectable dust grains of various compositions and charges. We will also contrast cup detectors to more open geometries that allow limited flow through the probe.
Gumbel Jörg
Horanyi Mihaly
Smiley Byron
Voss H. N.
No associations
LandOfFree
The effect of heating and sublimation on mesospheric dust traveling through shock fronts 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 The effect of heating and sublimation on mesospheric dust traveling through shock fronts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The effect of heating and sublimation on mesospheric dust traveling through shock fronts will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1272727