Diagnostics for liquid dispersion due to a high-speed impact with accident or vulnerability assessment application

Richard A. Jepsen, Timothy O'Hern, Byron Demosthenous, Ed Bystrom, Mark Nissen, Edward Romero, Suk Goo Yoon

Research output: Contribution to journalArticle

12 Citations (Scopus)


The high-speed impact and subsequent dispersion of a large liquid slug is of interest for assessing vulnerability of structures when subjected to such an event. The Weber number associated with such liquid impacts is generally between 10 5 and 10 8. Because of the experiment scale and destructive nature of these high-energy impacts, most traditional diagnostics are difficult to implement. Therefore, unique diagnostics were employed in several tests to gather information on impact force, spreading instability, slug break-up, ejection velocity, droplet deformation and spray characteristics. Measurement techniques discussed here include high-speed photometrics, particle image velocimetry (PIV), TrackEye particle analysis, speckle correlation, single-pass schlieren imaging, phase Doppler particle analyzer (PDPA) and load cell measurements as applied to large-scale, high-speed liquid impacts.

Original languageEnglish
Article number025401
JournalMeasurement Science and Technology
Issue number2
Publication statusPublished - 2009 Apr 9



  • Diagnostics
  • Dispersion
  • Impact
  • Vulnerability assessment

ASJC Scopus subject areas

  • Applied Mathematics
  • Instrumentation

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