| Title |
Mesh Sensitivity Analysis of Electrical Cable Tray Fires Using Fire Dynamics Simulator |
| Authors |
박동근(Dong-Geun Park) ; 황돈하(Don-Ha Hwang) ; 이호영(Ho-Young Lee) |
| DOI |
https://doi.org/10.5370/KIEE.2026.75.5.1152 |
| Keywords |
Electric cable tray fire; Fire Dynamics Simulator; Mesh sensitivity analysis; Cable fire procedure; Smokeview visualization |
| Abstract |
This study used the FDS(Fire Dynamics Simulator) to assess how grid size affects the prediction of HRR(Heat Release Rate) and computational time in electrical cable tray fires, through mesh sensitivity analysis. Two scenarios with different boundary and ventilation conditions were modelled. In Scenario 1, an open three tray was ignited by a 40 kW propane burner positioned beneath the lowest tier for 10 minutes. Scenario 2 involved five trays in two rooms connected by an open door with forced ventilation. Grid sizes of 0.05 m, 0.1 m and 0.2 m were tested. The predicted HRR was compared with experimental results to compute local and global errors. In Scenario 1, the 0.05 m grid produced the lowest global error of 0.337 %, while the 0.1 m grid demonstrated comparable accuracy, offering greater efficiency, and was therefore selected as the optimal option. In Scenario 2, the 0.05 m grid produced the smallest local and global errors and was selected as optimal. |