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Compressible Flows & Gaseous Explosions with FSI Applications


  • Ky­oung­su Im, Ph.D.


  • $650
  • $325 for students

What's Included

  • Two days of in­struc­tion
  • Class notes

Compressible Flows & Gaseous Explosions with FSI Applications


This class overviews the CESE and chem­istry solvers in LS-DY­NA®. The CESE solver is a com­press­ible flow solver that us­es the Con­ser­va­tion El­e­ment/­So­lu­tion El­e­ment Method. It can be used alone or cou­pled to the chem­istry solver. The class al­so specif­i­cal­ly fo­cus­es on how these solvers can be used with the struc­tures solvers to solve flu­id-struc­ture in­ter­ac­tion (FSI) prob­lems. Ex­er­cis­es il­lus­trate how to use these solvers.  

The class con­sists of two parts. In the first part we will dis­cuss com­press­ible flows with ap­pli­ca­tions that in­clude cav­i­ta­tion, FSI, and FSI with mul­ti-body dy­nam­ics prob­lems. The sec­ond part cov­ers the ba­sic con­cepts of chem­i­cal ki­net­ics with ap­pli­ca­tions, such as closed adi­a­bat­ic spa­tial­ly ho­mo­ge­neous pre­mixed re­ac­tors, det­o­nat­ing flows, and the de­for­ma­tion and fail­ures of sturctures in a nu­clear con­tain­ment by H2 ex­plo­sions. Each ex­er­cise con­sists of the prob­lem de­scrip­tion, mod­el­ing meth­ods, step by step key­word con­struc­tion, run­ning the pro­gram, and post-pro­cess­ing. 


Part 1: Compressible Flows and FSIs

  • In­tro­duc­tion to CESE com­press­ible solver
  • Ex­am­ples:
    • Shock mo­tion, dif­frac­tion, & re­flec­tion in cav­i­ty & ob­sta­cle cham­ber
  • FSI solvers
    • FSI-ibm solver: us­ing the im­mersed bound­ary method
    • FSI-mmm solver: us­ing the mov­ing mesh method
  • Ex­am­ples:
    • Mov­ing wedge con­fronting shock waves
    • Rigid & flex­i­ble pen­du­lums in­ter­act­ing with a flu­id
  • Ap­pli­ca­tion mod­els
    • Cav­i­ta­tion flow
    • Mul­ti­phase flows
    • Con­ju­gate heat trans­fer
  • New dual mesh CESE solver
    • Com­par­i­son of the stan­dard CESE solver to the new dual CESE solver

Part 2: Chemically Reactive Flow and FSI

  • In­tro­duc­tion to CHEM­ISTRY solver
  • Ba­sic con­cepts of the chem­i­cal ki­net­ics
  • Closed adi­a­bat­ic spa­tial­ly ho­mo­ge­neous pre­mixed re­ac­tors
  • Det­o­nat­ing flows and reini­ti­a­tion
  • De­for­ma­tion and fail­ures of struc­tures by gaseous ex­plo­sions
  • Bat­tery sim­u­la­tions