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An Improved Drop Impact Model for Lagrangian/Eulerian Coupled Codes

[+] Author Affiliations
Alexander L. Brown, Richard A. Jepsen

Sandia National Laboratories, Albuquerque, NM

Paper No. IMECE2009-11675, pp. 133-141; 9 pages
doi:10.1115/IMECE2009-11675
From:
  • ASME 2009 International Mechanical Engineering Congress and Exposition
  • Volume 3: Combustion Science and Engineering
  • Lake Buena Vista, Florida, USA, November 13–19, 2009
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4376-5 | eISBN: 978-0-7918-3863-1
  • Copyright © 2009 by ASME

abstract

Because we want to be able to model fires from high energy impact events as found in transportation accidents, we are interested in accurate representation of secondary impacts and splash, which presumably contribute significantly to the outcome of the event. We are focused on a Lagrangian/Eulerian framework as a simulation method. Historically, drop impact modeling has been driven by spray combustion applications, as reviewed in a paper by Cossali et al. [1]. They note numerous deficiencies, including that regime accuracy for many of the models is narrow. Testing and model development has provided improved sub-models that have allowed us to construct what we believe to be a more accurate and comprehensive model for impacting drops. The details of this model are presented along with a detailed description of the sub-model components. The model is employed to predict a 10 cm diameter, 10 and 20 m/s water drop impact test. This test case serves as an initial verification and validation test of the implemented code.

Copyright © 2009 by ASME
Topics: Drops

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