Abstract
An experimental study was performed on the effects of heating conditions and the initial temperature of a fluid T_0 on free convection heat transfer in a stably stratified fluid. The stratified layer was formed in a rectangular container using sucrose aqueous solution, and was heated laterally from one side at temperature T_h, with constant heat flux and cooled from the other side at constant temperature T_c. The experiments were conducted for both cases of T_0=T_c and T_c<T_0<T_h. From a comparison with previous results for constant heating temperature it has been found that the constant heat flux condition tends to make uniform convection layers, and that the effects of the initial temperature on the heat transfer is limited to the early stage of heating. A relation between the thickness of a convection cell and the heat transfer coefficient was also clarified in the preset study.
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