The characteristics of the fluidized bed combustion are highlighted. The concept of fluidization is clarified and the corresponding flow features are illustrated in terms of what have been documented in the literature about such systems. The most relevant previous works have been documented either in the cold flow study area or in correspondence to the reactive flow aspects. Photos from preliminary works by the author are provided to visualize the cold flow and combustion characteristics of the fluidized bed in order to reveal the interesting features that set the potential for future works. The turbulence development and the subsequent impact on the combustion characteristics are explored in order to set the base for future research works that effectively serve the industrial community. In this regard, the recommendations for future works are provided at the end to provide the sustainability of the system upon involving more innovative designs and working scenarios of the fluidized bed combustors in the industrial field.