Open AccessFDS simulation of smoke backlayering in emergency lay-by of a road tunnel with longitudinal ventilation
Author(s) -
Peter Weisenpacher,
Ján Glasa,
Lukáš Valášek,
Tatiana Kubisova
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2090/1/012100
Subject(s) - smoke , stratification (seeds) , visibility , fire dynamics simulator , meteorology , environmental science , engineering , geography , seed dormancy , botany , germination , dormancy , biology
This paper investigates smoke movement and its stratification in a lay-by of a 900 m long road tunnel by computer simulation using Fire Dynamics Simulator. The lay-by is located upstream of the fire in its vicinity. The influence of lay-by geometry on smoke spread is evaluated by comparison with a fictional tunnel without lay-by. Several fire scenarios with various tunnel slopes and heat release rates of fire in the tunnels without and with the lay-by are considered. The most significant breaking of smoke stratification and decrease of visibility in the area of the lay-by can be observed in the case of zero slope tunnel for more intensive fires with significant length of backlayering. Several other features of smoke spread in the lay-by are analysed as well. The parallel calculations were performed on a high-performance computer cluster.