Numerical Study on Flow Over Two Inline Triangular Cylinders—Influence of Gap Ratio on Vortex Shedding

In the present study, numerical simulation was carried out for the flow around the two inline equilateral triangular cylinders at different gap ratios (G/D) for various Reynolds numbers (Re). The numerical investigations are carried out for 75 ≤ Re ≤ 200 and 0 ≤ G/D ≤ 2.5. The governing differential equations for laminar incompressible flow are discretized using finite volume method and PISO algorithm is employed to convert PDE to algebraic equation using the open-source software package. The effect of G/D ratio and Re on the non-dimensional shedding frequency Strouhal number (St) is investigated with the aid of vorticity plot and velocity profiles.