Review on effect of two-phase interface morphology evolution on flow and heat transfer characteristics in confined channel

In this paper, the effect of two-phase interface morphology evolution on the flow and heat transfer characteristics in confined channels are reviewed in detail, which is one of the typical channel structures for the nuclear reactor core. The investigated contents mainly come from the open literature. In addition, this paper focuses on the important phenomena and methods proposed in recent decades, which simultaneously includes the closely related studies of authors published in the last several years. The primary contents of this paper mainly includes the following aspects: (1) the definition of confined channel is introduced based on the summary of various distinguishing criterions; (2) the effect of two-phase interface morphology on the flow and resistance characteristics is concluded, which are mainly related to the adiabatic flow conditions, thus the complex influence of boiling phenomenon can be neglected; (3) the effect of two-phase interface morphology on the flow boiling heat transfer characteristics is researched. Moreover, the development of flow boiling heat transfer model is reviewed, and the corresponding proposed model is introduced, which innovatively reflects the feature of confined channel and is considered worthy of further development; (4) the effect of two-phase interface morphology on the flow instability and boiling crisis characteristics are reviewed. Especially, the coupling relationship between them are introduced with the bubble dynamic behaviors dependent on the published research achievement of authors; (5) the material surface modification technology is proposed to be the enhanced heat transfer technology, which is also supposed to be the future research point for reactor thermal-hydraulics.