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CFD benchmark on hydrogen release and dispersion in confined, naturally ventilated space with one vent

Giannissi, S.G., Shentsov, Volodymyr, Melideo, Daniele, Cariteau, Benjamine, Baraldi, Daniele, Venetsanos, Alexandros and Molkov, Vladimir (2015) CFD benchmark on hydrogen release and dispersion in confined, naturally ventilated space with one vent. International Journal of Hydrogen Energy, 40 (5). pp. 2415-2429. [Journal article]

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DOI: 10.1016/j.ijhydene.2014.12.013

Abstract

A CFD benchmark was performed within the HyIndoor project, to study hydrogen releaseand 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 thisbenchmark. In all three tests helium (instead of hydrogen for safety reasons) was releasedvertically upwards at 60 NL/min from a 20 mm orifice near the centre of the enclosure. Adifferent 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-HFand ANSYS CFX) and three different turbulence models respectively (transitional SST,standard k-ε, dynamic Smagorinski LES). In general, good agreement was found betweenpredicted and measured helium concentrations. However, in the case of the vent with thesmallest vertical extension (vent c) all predictions overestimate the concentration at thelower part of the enclosure at steady state.

Item Type:Journal article
Keywords:Hydrogen safety, Enclosure, Natural ventilation, CFD, Release and dispersion, Benchmark
Faculties and Schools:Faculty of Art, Design and the Built Environment
Faculty of Art, Design and the Built Environment > School of the Built Environment
Research Institutes and Groups:Built Environment Research Institute
Built Environment Research Institute > Hydrogen Safety Engineering and Research Centre (HySAFER)
ID Code:31620
Deposited By: Professor Vladimir Molkov
Deposited On:19 May 2015 08:52
Last Modified:19 May 2015 08:52

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