2.9. In general, A heat fluxes are absorbed by the boundary layer flow at the wall of the liquid containment,
thereby superheating the boundary layer and providing the buoyancy from the density difference to drive the natural
convective flow at the wall and the liquid recirculation. The superheated liquid is carried up to the surface where it
turns over and streams radially inwards along the surface, during which time evaporation takes place to provide the
boil-off mass flow. At the centre, the radial inflow joins the downward jet flow, evaporation ceases, and any
remaining superheat is carried into the bulk of the liquid. The point to note is that the surface where the heat is
absorbed and carried away by the boil-off vapour is a remote distance from the entry areas of the a heat fluxes.