Abstract
Solar pond is a storage technology of solar heat. The double diffusive phenomena in solar pond were numerically studied for a two-layer system which consists of a pure water (upper layer) and an aqueous solution (lower layer) with the heating from the entire bottom at the Prandtl number Pr=6, the Lewis number Le=100, the Rayleigh number Ra=10^7, the buoyancy ratio N=2 and the volume of a lower layer V_<low>=20 or 50%. The convection in a lower layer was circulating flows at V_<low>=20% and ascending plumes at V_<low>=50%.
