CFD analysis on the NUPEC PWR Subchannel and Bundle Test (PSBT)


CFD analysis on the NUPEC PWR Subchannel and Bundle Test (PSBT)

Krepper, E.; Rzehak, R.

The presentation shows CFD calculations of the void distribution tests of the PSBT benchmark using ANSYS CFX-12.1. First, relevant aspects of the implemented wall boiling model are reviewed highlighting the uncertainties in several model parameters. It is then shown that the measured cross sectionally averaged values can be reproduced well with a single set of calibrated model parameters for different tests cases. For the reproduction of patterns of void distribution cross sections attention has to be focussed on the modelling of turbulence in the narrow channel. Only a turbulence model with the capability to resolve turbulent secondary flows is able to reproduce at least qualitatively the observed void distribution patterns.

Keywords: CFD; wall boiling; CFX; PSBT benchmark; rod bundle; two phase flow; turbulence

  • Lecture (Conference)
    20th Meeting of the CFD Network, 07.-08.03.2012, Garching, Gemany

Permalink: https://www.hzdr.de/publications/Publ-16929
Publ.-Id: 16929