Physical background to convective heat transfer

Abstract

The results of the preceding chapters have intentionally been derived using only dimensional analysis and evaluation of experiments. If possible, intuitive interpretations were avoided even by ignoring the physical substance of the rather surprising form, at first glance, of equation (4.20) and the length scale l_t (4.26). So, the approach introduced in the preceding chapters provides mainly the ‘what’ but not the ‘what’ of convective heat transfer in bubbling fluidized beds. Therefore, the aspects of this chapter are twofold: to provide an a posteriori more profound understanding of the features found; and to make clear the fundamental difference between convective heat transfer and radiative mode, the subject of Chapter 11.