[pasha72]

Hi everybody
I'm trying to perform a simulation for methane-air 2 step. My geometry is attached and the mesh is OK.
I'm using these settings and methods:
Models:
RNG k-e viscous, P1 Radiation, Volumetric Species transport with Eddy-Dissipation
air and fuel inlet BCs
Solution Methods:
SIMPLE Scheme for pressure-velocity coupling, Least square cell based for gradient, standard for pressure and first-order upwind for the rest of all.
Solution Controls:
Pressure: 0.3, density and body force: 1, all species: 0.5 and the rest: 0.8
Solution initialization is hybrid
I also attached Residuals plot and velocity magnitude contour. How can I improve convergence and accuracy of he solution?
Thanks for your recommendation