A numerical benchmark exercise, aimed at assessing the behaviour of codes and models in the prediction of stability conditions in heated channels with fluids at supercritical pressure, was hosted by the University of Pisa within the framework of the IAEA CRP on “Heat Transfer Behaviour and Thermo-hydraulics Codes Testing for SCWRs”. Eight institutes from different countries participated in the exercise. The first part of this benchmarking activity was aimed at comparing the results of linear and non-linear codes and models in the application to a simple reference geometrical condition. The simplicity of the problem proposed was conceived to allow for the application of one-dimensional models. The results of the analyses were reported in dimensionless form, adopting recently proposed definitions in order to check their suitability to represent stability thresholds. Both dynamic and static instabilities were addressed. The paper summarizes the analysis of the results of this benchmark exercise.

Analysis of the IAEA Benchmark Exercise on Flow Stability in Heated Channels with Supercritical Fluids

AMBROSINI, WALTER;
2011-01-01

Abstract

A numerical benchmark exercise, aimed at assessing the behaviour of codes and models in the prediction of stability conditions in heated channels with fluids at supercritical pressure, was hosted by the University of Pisa within the framework of the IAEA CRP on “Heat Transfer Behaviour and Thermo-hydraulics Codes Testing for SCWRs”. Eight institutes from different countries participated in the exercise. The first part of this benchmarking activity was aimed at comparing the results of linear and non-linear codes and models in the application to a simple reference geometrical condition. The simplicity of the problem proposed was conceived to allow for the application of one-dimensional models. The results of the analyses were reported in dimensionless form, adopting recently proposed definitions in order to check their suitability to represent stability thresholds. Both dynamic and static instabilities were addressed. The paper summarizes the analysis of the results of this benchmark exercise.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/148695
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