Physics
Scientific paper
Feb 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18..261b&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 18, Feb. 1991, p. 261-264. Research supported by DFG.
Physics
21
Carbon Dioxide, Comet Nuclei, Ice, Interplanetary Dust, Methyl Alcohol, Temperature Effects, Comet Tails, Heat Transfer, Temperature Gradients, Water Vapor
Scientific paper
The thermal evolution of ice-methanol-CO2-dust specimens in the KOSI comet-simulation experiments is described. In KOSI, 30-cm-diameter 15-cm-thick ice samples are exposed to Xe-lamp irradiation at 77 K in the vacuum chamber of the DLR Koeln large space simulator. Temperature profiles through the specimens are obtained using copper-constantin thermocouples and PT-100 thermistors; the results are presented in graphs and compared with theoretical predictions. The water-ice and CO2 sublimation fronts are characterized by temperatures of 210 and 125 K, respectively, and by the presence of temperature-gradient discontinuities. Heat transfer by water-vapor flow and conduction through the matrix amounted to about 50 percent and about 5 percent of the insolation heat, respectively. Also calculated were: matrix thermal diffusivity = (2-13) x 10 to the -8th sq m/sec and sample permeability = 0.01 sq m/sec.
Benkhoff Johannes
Spohn Tilman
No associations
LandOfFree
Thermal histories of the KOSI samples 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 Thermal histories of the KOSI samples, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermal histories of the KOSI samples will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1316771