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Ansys Learning Forum › Forums › Discuss Simulation › Fluids › Not being able to replicate paper simulations › Reply To: Not being able to replicate paper simulations

November 25, 2024 at 4:12 pm
Ren
Ansys Employee

Thank you for the information.

  1. the velocity looks wrong if it's zero at the inlet. Anyway, the flame speed of stoichiometric h2-air is about 2.4 m/s. This means that the flame will move upstream. So, it's not possible to get a flame shape looking like that in the paper. A quick calc (with some assumptions) shows that Re = rho*U*L/mu = 1.2*1*0.002/2e-5 = 120. So the flow is probably laminar.
  2. the EDC model in general will require some kind of "ignition" (either patching or starting from a solution already having a flame). Did you check the temperature field after the initialization? 
  3. The residuals plot does not have a key.
  4. The mass balance is good but the heat fluxes look very unbalanced.
  5. Did you check if the parameter values for the Sutherland viscosity actually make sense?