We report on experimental and theoretical studies of ice lenses in saline porous media. We find that at slow freezing rates a single ice lens can grow stably. At faster rates the ice lens becomes unstable, and complex structures such as multiple lenses and cellular or dentritic ice appear within the porous medium. A linear stability analysis is employed to predict conditions for the onset of the instability. Solute diffusion is found to substantially enhance the instability, consistent with the experimental observations.
Comments: 11 Pages.
[v1] 2016-07-02 16:06:01
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