[shiyamkumaran]

I am having problem in obtaining same species results between fluent V14.5 and V18.1. I have used the same case file in both solvers and found V14.5 provides converged solution, but V18.1 hasn't provided converged solution with the same B.C as 14.5.
My objective is to obtain the same results in both the version without changing any numerical setting.
I have got better convergence for velocity, pressure and flow terms in both the versions.
I am having problem only with species, which is not converging in V18.1 with same setting.
I have restriction to stick with same setting.
What I have to do to obtain the same result on both versions?
Please help me in this regard. Thanks in advance.