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Turbulent flow past an equilateral triangular cylinder with splitter plateinserted downstream is numerically tested for different gap ratios (0, 0.5, 1,1.5, 2) and plate dimensions (0, 1, 1.5) on the flow field and heat transfercharacteristics. Unsteady flow simulations are carried out at Re=22,000 in afinite volume based collocated framework, on a two-dimensional unstructuredmesh. Reynolds averaged momentum and energy equations are solved in conjunctionwith the standard $\kappa$-$\epsilon$ model. In this study, cylinder andcontrol plate are subjected to constant wall temperature. It is observed thatthe drag force on the triangular cylinder-splitter plate system reduced with anincrease in gap ratio. Vortex shedding is suppressed as Strouhal number (St)reduced to its least value for the maximum gap-ratio configuration studied.Heat transfer performance is also significantly improved with the inclusion ofa finite gap. In addition to that, the effect of variation in length of thesplitter plate has also been studied on the force coefficients, Strouhalnumber, local and surface averaged Nusselt number. Results show that increasingthe length of the splitter plate significantly suppressed the shedding with aminimum frequency obtained for the maximum plate length of Ls/h = 1.5. However,overall heat transfer reduced with the increase in plate length.

Numerical analysis of turbulent forced convection and fluid flow past a  triangular cylinder with control plate using standard $\kappa$-$\epsilon$  model