Energetic numerical ANSYS simulations of the cold plug experiment in SWATH. The left figure corresponds to the “zero time”, the instant of the cooling and heating shutdown. The right figure is for the instant where the liquid salt find a path against the wall (t = 378 s). With the temperature color scale used, only the solid salt and a thin mushy region represented with a fine color scale varying with temperature are shown, the liquid covering salt does not appear in the figure.