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UID:0-301@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20200108T163000

DTEND;TZID=Asia/Jerusalem:20200108T173000

DTSTAMP:20230527T131322Z

URL:https://aerospace.technion.ac.il/events/guest-seminar-fast-and-highly-
 compressible-single-and-multi-phase-reacting-flows/

SUMMARY:Guest Seminar - "Fast and Highly Compressible Single- and Multi-Pha
 se Reacting Flows"
DESCRIPTION:Lecturer:Dr. Yoram Kozak\n Faculty:Department of Aerospace Engi
 neering\n Institute:Texas A&M University\, College Station\, TX\, USA\n Lo
 cation:Classroom 165\, ground floor\, Library\, Aerospace Eng.\n Zoom: \n 
 Abstract: \n Details: \n High flow speeds and significant compressibility 
 levels can be found in a wide range of single- and multi-phase reacting fl
 ows. These include various propulsion and energy conversion systems\, such
  as scramjet and detonation engines\, industrial explosions\, and differen
 t military applications.\nBetter understanding of these extreme flow regim
 es is possible by either experimentation or numerical modeling. The latter
  requires the development of novel modeling approaches capable of providin
 g high accuracy in these extreme regimes characterized by large spatial an
 d temporal variability.\nIn this talk\, several unique numerical and exper
 imental difficulties\, each associated with a different flow configuration
  of interest\, will be discussed. First\, the limitations of the classical
  Eulerian-Lagrangian formulation for multi-phase flow modeling under highl
 y compressible conditions will be presented. It is demonstrated that for h
 ighly compressible flows\, typical interpolation methods fail and a Weight
 ed-Essentially-Non-Oscillatory (WENO) interpolation can provide a superior
  alternative. This new formulation is then utilized to critically assess t
 he accuracy of the classical Particle Image Velocimetry (PIV) technique fo
 r flow characterization in gas-phase detonations and high-speed turbulence
 . Also\, newly developed numerical techniques and models for liquid spray 
 and solid particle combustion will be discussed. Then\, the dynamics of hi
 ghly compressible\, fast\, turbulent flames capable of undergoing a transi
 tion to a detonation wave are studied using Direct Numerical Simulations (
 DNS) based on realistic experimental conditions. The results raise questio
 ns regarding the ability of the classical RANS and LES techniques to model
  properly the complex physics associated with these inherently unstable fa
 st turbulent reacting flows.\nFinally\, future research directions in the 
 context of the problems discussed above will be presented.
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

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TZID:Asia/Jerusalem

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DTSTART:20191027T010000

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