“…Many previous studies of convection in cavity receivers (e.g. [8,9,10,11]) have simplified the problem by imposing either a uniform temperature or a heat flux distribution on the inner cavity surface, thus decoupling the radiative and convective heat transfer problems. In this part of the current study, we also maintain a decoupling between the two heat transfer mechanisms, but instead impose a temperature distribution that is non-uniform (as suggested by the simplified, but integrated, modelling of thermal emissions and the heat transfer fluid [6]).…”