Sealed and insulating vessel comprising a deflection element allowing the flow of gas at a corner

The invention concerns a sealed and thermally insulating vessel for storing a fluid, comprising a thermally insulating barrier comprising: a plurality of insulating elements disposed along the walls of the vessel, arranged to allow the flow of fluid, such as a gas, within said thermally insulating barrier; and a corner arrangement, disposed at the intersection between first and second walls (3, 4) of the vessel, the corner arrangement comprising: a deflection element (19) comprising a first face (20a) facing the supporting structure of the second wall (4), a second face (20b) facing the supporting structure of the first wall (3) and a plurality of curved channels (21) extending between the first face (20a) and the second face (20b) of the deflexion element (19) to allow the flow of fluid, such as a gas, through the corner arrangement, the plurality of curved channels (21) comprising at least a series of curved channels spaced apart from each other in the thickness direction of the walls (3, 4) of the vessel.