In this paper, Reynolds average Navier stokes models simulation was computed
with standard k-є, realizable k-є and SST k-w.The three models were proposed to forecast the
turbulence flow behaviour inside a rectangular channel with two baffle plates. The geometry
and the grid were generated using commercial CFD software fluent. The flow behaviours of
three models were characterized based on positions of the entrance to the first baffle,
positions between first and second baffle and lastly the second baffle. At the three different
positions the three models studied have demonstrate differences in the velocity profiles and
separation range. Comparison with previous literatures shows applicability of these three
models to produce velocity profile characteristics and separation behaviours. Even though
some of the models have shown slight deviation from the experimental results but in general
the three models were considered to be in close agreement with most published literatures.