A heat transfer correlation for flow channels in a prismatic core VHTR | Conference Paper individual record

This paper presents the results of a coupled 3-D thermalhydraulics and CFD analysis of helium flow in a coolant channel of a prismatic core, Very High Temperature Reactor (VHTR). Results are used to develop a turbulent convection heat transfer correlation that accounts for induced mixing in the entrance region as: h=[0.10(k/D)Reb0.653Prb.0.4][1 + 0.57e-(0.20z/D)] The entrance effect (second term) increases the local turbulent heat transfer coefficient, but diminishes for z/D > 25. This correlation is within ± 2% of the numerical results.

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Travis, B. W., & El-Genk, M. S.
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