Modelling and Validation of Turbulent Boiling Flow in a Rectangular Channel
NURETH-14 - 2011 September 25-30

Presented at:
2011 September 25-30
Toronto, Canada
Session Title:
B3-3 Core Thermalhydraulics and Subchannel Analysis

Boštjan Končar (Jožef Stefan Institute)
Marko Matkovič (Jožef Stefan Institute)


The boiling flow experiments in a rectangular vertical channel, performed at the Texas A&M University, were used to validate the prediction capabilities of the NEPTUNE_CFD code. The refrigerant HFE-301 was used as a working fluid. Liquid velocity and turbulent kinetic energy profiles close to the heated wall were compared. NEPTUNE_CFD simulations successfully predict the main experimental tendencies associated with the heat flux and Reynolds number variation. However, a disagreement in velocity and turbulence magnitude can be observed in the boiling region at lower Reynolds numbers. The size of experimental bubble diameter in the vicinity of the heated wall is assessed by the means of non-dimensional analysis.

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