Due to some personal reasons of the fellow, the project could run only for a quarter of the scheduled duration (6 out of 24 months). Therefore, the original objectives of the project were achieved partially. Currently, we have run simulations of meltwater plumes in freshwater, as a preliminary to in saltwater. We have tested the impact of the slope angle, which varies between ice shelves, on the variations of plume properties along the ice base. We have used the Nek5000 simulation code and ran the simulations on the Pole Scientifique de Modélisation Numérique of ENS de Lyon. The results are in qualitative agreement with previous work but show quantitative discrepancies, which we explore and explain in detail in an upcoming manuscript that will be submitted to the Journal of Fluid Mechanics. We have also run simulations of subglacial lakes, whose dynamics share similar physical ingredients as sub-ice oceans and are of interest to several team members at the Laboratoire de Physique of ENS de Lyon. In essence, we have:
a) developed and validated a numerical model capable of resolving under-ice ocean dynamics in the near-grounding-line region. However, as a starting point, the effect of salinity was not taken into consideration and a freshwater environment was studied. Further, direct numerical simulation (DNS) was used in these simulations instead of the originally proposed large-eddy simulation (LES) model.
b) a manuscript targeting the prestigious "Journal of Fluid Mechanics" is in its final phase of preparation
c) preliminary results of this study were presented in FRISP 2024 and NEK User Meeting
