No ignition (Fluent)

    • Marcel Mikołajczyk


      I am facing problem while simulating shock tube detonation (2d, transient, no inlets, no outlets)

      After reflection of the wave at the wall there should be ignition or even detonation, however in my case the fractions of species remain the same in domain through whole simulation. I am using Hydrogen (2004) reaction mechanism from this page:https://www.universityofgalway.ie/combustionchemistrycentre/mechanismdownloads/
      I am using Reaction Mechanism, Theromdynamics and Transport for "Import CHEMKIN Mechanism" in Fluent(Species) as .txt - is it ok? What is the problem of no ignition?

      Moreover my residuals do not converge, what can I do besides mesh? Energy, y-velocity and h2o2 are above 1e+0 from beginning and after reflection everything ramps


    • Rob
      Ansys Employee

      Depending on which model(s) you're using you may need to patch a small region of high temperature or some product species into the domain: check the Users Guide for which. 

    • Essence
      Ansys Employee


      The extension files of CHEMKIN mechanism is .inp, .thermo and .dat. Try to open in these formats.

Viewing 2 reply threads
  • You must be logged in to reply to this topic.