Optical flow tracking velocimetry of near-field explosions

Abstract To better understand the complex dynamics and physics associated with rapid expansion of detonation product fireball following an explosion, it is imperative to have a full description its velocity field. Typical experimental techniques rely on simple single-point measurements captured from pressure transducers or Hopkinson bars. In this technical design note, we aim improve current state-of-the-art by introducing means determine fields high-speed video using optical flow tracking velocimetry. We demonstrate significance method our results comparing derived validated numerical model same case. A wider use technique will allow researchers elucidate spatial temporal features explosive detonations, which could not be obtained thus far measurements.