Results from a laboratory-scale investigation of a fire spreading on the windward face of a
triangular-section hill of variable shape with wind perpendicular to the ridgeline are
reported. They confirm previous observations that the fire enlarges its lateral spread after
reaching the ridgeline, entering the leeward face with a much wider front. Reference fire
spread velocities were measured and analysed, putting in evidence the importance of the
dynamic effect due to flow velocity and its associated horizontal-axis separation vortex …

Laboratory scale investigation of a fire spreading on the windward face of a triangular
section hill of variable shape with wind perpendicular to the ridgeline was performed. The
work confirmed previous observations that the fire enlarges its lateral spread after reaching
the ridgeline entering the leeward face with a much wider front. Reference fire spread
velocities were measured and analyzed putting in evidence the importance of the dynamic
effect due to flow velocity and its associated horizontal axis separation vortex strength …