Computer Science – Numerical Analysis
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994p%26ss...42..545l&link_type=abstract
Planetary and Space Science, vol. 42, no. 7, p. 545-555
Computer Science
Numerical Analysis
12
Densification, Granular Materials, Ice, Icy Satellites, Kinetics, Mixtures, Phase Transformations, Planetary Evolution, Rheology, Rocks, Thermodynamic Properties, Numerical Analysis, Phase Diagrams, Porosity, Porous Materials
Scientific paper
This paper concerns the rheological experiments on compaction of water ice and water ice/rock samples prepared from granular material. The rock to total mass ratio was C = 0, 0.25, 0.465, 0.5, 1 for five different samples. The temperature was kept constant, T = 213 K, for all experimental runs. The pressure regime, p = 80-820 MPa, is that which is interesting from the point of view of the physics and evolution of the interiors of the icy satellites of the giant planets. The densification rate, (drho/dt)/rho, encountered in the experiments decreased from some 10-4/s at the beginnig of a run to 10-7 - 10(exp -8/s at the end, some hours later. The densification rate itself mainly represents: (1) the rate of decrease of porosity (dq/dt)/q, when the pressure is relatively low (lower than the phase transition pressure ice I to ice II, approximately 200 MPa), and (2) the kinetics of the phase transitions ice I to ice II to ice VI when the pressure exceeds 200 and 600 MPa, respectively. The appropriate formulae were fitted to the experimental data: (1) the formula for the rate of decrease of porosity; it is of the same type as it was established previously for pressure up to 17.7 MPa. (2) the formula for the phase transition rate. The experimental results, when extrapolated to lower temperatrues, provide data appropriate for the icy-/rocky regolith of satellites: it is very plausible that the porous regolith layer extended in the past or it extends even now, to the deep interiors of medium size satellites. The kinetics of the phase transitions within the icy component of satellites must influence the convection and differentiation processes and therefore it is related to the tectonics of satellites.
Erikoinen O.
Kossacki Konrad J.
Leliwa-Kopystyński Jacek
Makkonen L.
No associations
LandOfFree
Kinetics of pressure-induced effects in water ice/rock granular mixtures and application to the physics of the icy satellites 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 Kinetics of pressure-induced effects in water ice/rock granular mixtures and application to the physics of the icy satellites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Kinetics of pressure-induced effects in water ice/rock granular mixtures and application to the physics of the icy satellites will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-823408