Ablation of sloping ice faces into polar seawater
Mainak Mondal, Bishakdatta Gayen, Ross W Griffiths, Ross C Kerr
JOURNAL OF FLUID MECHANICS | CAMBRIDGE UNIV PRESS | Published : 2019
The effects of the slope of an ice-seawater interface on the mechanisms and rate of ablation of the ice by natural convection are examined using turbulence-resolving simulations. Solutions are obtained for ice slopes θ = 2°-90°, at a fixed ambient salinity and temperature, chosen to represent common Antarctic ocean conditions. For laminar boundary layers the ablation rate decreases with height, whereas in the turbulent regime the ablation rate is found to be height independent. The simulated laminar ablation rates scale with (sinθ) 1/4 , whereas in the turbulent regime it follows a (sin θ) 2/3 scaling, both consistent with the theoretical predictions developed here. The reduction in the abla..View full abstract
Awarded by Australian Research Council
Awarded by ARC DECRA Fellowship
Computations were carried out using the Australian National Computational Infrastructure, through the National Computational Merit Allocation Scheme supported by the Australian Government. This work was supported by Australian Research Council grants DP120102772 and DP120102744. B.G. was supported by ARC DECRA Fellowship DE140100089 and an Australian Antarctic Division RJL Hawk Fellowship to B.G. We are also grateful to the reviewers who provided valuable suggestions throughout the review process.