Ice rubble consolidation
A test series has been performed under laboratory conditions to investigate the rate of consolidation (i.e. refreezing) of broken ice (ice rubble). The tests were done with model ice (representing sea ice) and with freshwater ice. In total, sixteen experiments were performed in which several test pa...
| Main Authors: | , |
|---|---|
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
1988
|
| Subjects: | |
| Online Access: | https://nrc-publications.canada.ca/eng/view/ft/?id=aa87e238-1d2d-40af-8741-e4250c3397d8 https://nrc-publications.canada.ca/eng/view/object/?id=aa87e238-1d2d-40af-8741-e4250c3397d8 https://nrc-publications.canada.ca/fra/voir/objet/?id=aa87e238-1d2d-40af-8741-e4250c3397d8 |
| Summary: | A test series has been performed under laboratory conditions to investigate the rate of consolidation (i.e. refreezing) of broken ice (ice rubble). The tests were done with model ice (representing sea ice) and with freshwater ice. In total, sixteen experiments were performed in which several test parameters were varied including ice piece size, air temperature and ambient wind chill. Both the measurements and the samples cut from the rubble show variability in the rate at which the freezing front advances through the rubble. The average depth of consolidation in the rubble, however, appears to be linear with respect to the square root of the freezing index (i.e. the product of the freezing temperature and freezing time). For the test conditions used, the rate of consolidation of the broken ice rubble was approximately twice as high as the growth rate for level ice under the same ambient conditions. Une série d'essais a été menée en laboratoire afin d'étudier le taux de consolidation (c.-d. recongélation) de la glace brisée (glace en fragments). Les essais ont été effectués avec de la glace modèle (représentant de la glace de mer) et avec de la glace d'eau douce. Au total, on a procédé seize expériences lors desquelles des paramètres variaient, p. ex. la dimension des fragments, la température de l'air et le refroidissement éolien. Les mésures comme les échantillons de fragments montrent la variabilité de la vitesse laquelle le front de congélation progresse dans les fragments. La profondeur moyenne de consolidation des fragments semble toutefois varier linéarement par rapport la racine carrée de l'indice de congélation (c.-d. le produit de la température de congélation et de la durée de la congélation). Dans les conditions d'essai utilisées, le taux de consolidation des fragments de glace était approximativement deux fois supérieur au taux de formation de glace unie dans les mêmes conditions ambiantes. Peer reviewed: Yes NRC publication: Yes |
|---|