TY - CONF A1 - Knaust, Christian T1 - Modelling tunnel fires considering the structure, fluid flow and the soot T2 - Proceedings from the Seventh International Symposium on Tunnel Safety and Security N2 - The time dependent thermal behavior is analyzed with FLUENT for the fluid as well as the solid region (concrete component) in case of a 100 MW n-heptane fire. To study the effect of parameters in mathematical-physical models several sensitivity studies were carried out to investigate the effect on the fluid flow as well as on the component. The influence of soot was additionally considered. FDS simulations as well as empirical calculations considering underlying assumptions are additionally used to examine the plausibility of results from the FLUENT simulations. This is an appropriate method if no experimental results are available. Recommendations are given for choosing parameters in mathematical-physical models e.g. radiation models. The results of the CFD investigations show that considering the influence of soot provides maximum temperatures which were 200 K lower than without soot. T2 - Seventh International Symposium on Tunnel Safety and Security CY - Montréal, Canada DA - 16.03.2016 KW - Heat transfer KW - Conduction KW - Radiation KW - Computational fluid dynamics KW - Temperature dependent properties KW - Model checking KW - Analytical and empirical calculations KW - ANSYS FLUENT KW - FDS PY - 2016 SN - 978-91-88349-11-8 SN - 0284-5172 SP - 617 EP - 628 CY - Boras AN - OPUS4-37688 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -