problem with v-gutter flowfield
i have been trying to simulate steady flowfield past a v-gutter flameholder for like three months, using both RNG-ke, realizable ke turbulence model. all the spatial discretization scheme are second order. when i use simple scheme for pressure-velocity coupling, the soluting can not converge,the velocity of a monitor point fluctuates. when i use coupled scheme for pressure-velocity coupling, the solution converged, but the length of the recirculation zone is far more larger than what i get from experiments. so, although it can converge, the solution is wrong.
does anybody here has this kind of experiences? could you share your solutiong methods with me?
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