Conference article

Effect of natural convection and radiation inside of a hollow beam in a standard fire

Turo Välikangas
Laboratory of Chemistry and Bioengineering, Technical University of Tampere, Finland

Sami Pajunen
Laboratory of Civil Engineering, Technical University of Tampere, Finland

Jolanta Baczkiewicz
Laboratory of Civil Engineering, Technical University of Tampere, Finland

Singh Shobhana
Energy Technology, Aalborg University, Denmark

Kim Sørensen
Energy Technology, Aalborg University, Denmark

Download articlehttp://dx.doi.org/10.3384/ecp17138121

Published in: Proceedings of the 58th Conference on Simulation and Modelling (SIMS 58) Reykjavik, Iceland, September 25th – 27th, 2017

Linköping Electronic Conference Proceedings 138:16, p. 121-127

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Published: 2017-09-27

ISBN: 978-91-7685-417-4

ISSN: 1650-3686 (print), 1650-3740 (online)

Abstract

In the design of steel structures, special attention must be paid on structural fire design in order to ensure a specified safe time period that the structure can withstand the fire without collapse. In the European design rules, the standard practise assumes uniform temperature for steel beam cross sections while the surrounding area is subjected to the so called standard fire. When the ambient temperature field is not uniform (e.g. at beam joint areas) neither will be the beam cross section temperature field. This paper studies the contribution of natural convection and cavity radiation to the temperature field of a hollow beam cross section in the case of non-uniform ambient temperature by using transient CFD-simulations.

Keywords

Hollow beam,natural convection, cavity radiation, structural fire design, Open- Foam

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