CFD benchmark on hydrogen release and dispersion in confined, naturally ventilated space with one vent
A CFD benchmark was performed within the HyIndoor project, to study hydrogen release
and dispersion in a confined space with natural ventilation and one vent. Three experiments,
performed earlier by CEA at their GAMELAN 1 m3 facility, were considered for this
benchmark. In all three tests helium (instead of hydrogen for safety reasons) was released
vertically upwards at 60 NL/min from a 20 mm orifice near the centre of the enclosure. A
different vent size was used for each test. Three HyIndoor partners (JRC, NCSRD and UU)
participated in the benchmark, with three different CFD codes, (ANSYS Fluent, ADREA-HF
and ANSYS CFX) and three different turbulence models respectively (transitional SST,
standard k-ε, dynamic Smagorinski LES). In general, good agreement was found between
predicted and measured helium concentrations. However, in the case of the vent with the
smallest vertical extension (vent c) all predictions overestimate the concentration at the
lower part of the enclosure at steady state.
GIANNISSI Stella;
SHENTSOV Volodymir;
MELIDEO Daniele;
CARITEAU Benjamin;
BARALDI Daniele;
VENETSANOS Alexander;
MOLKOV Vladimir;
2015-02-10
PERGAMON-ELSEVIER SCIENCE LTD
JRC90767
0360-3199,
http://www.sciencedirect.com/science/article/pii/S0360319914033485,
https://publications.jrc.ec.europa.eu/repository/handle/JRC90767,
doi:10.1016/j.ijhydene.2014.12.013,
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