Abstract

The mechanisms associated with the enhancement of heat transfer over the front of a tube in a gas-particle cross flow are investigated. A correlation derived in a previous study of enhancement from the increased thermal capacity of the suspension is modified to take account of local particle residence times and the calculations of gas-to-particle heat transfer are refined. The influence on the enhancement of conduction between an impacting particle and the tube wall is analysed and the correlation is modified to include the effect of energy transport by rebounding particles. In addition, the effects of changes in the gas flow structure and boundary-layer characteristics on local heat transfer are explored.

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