وحید فرهنگ مهر

In the current investigation, a characteristics-based (CB) finite-volume solution was developed to improve the convergence rate and the solution stability for the numerical simulation of incompressible viscous flows. The artificial compressibility method (ACM) which couples the continuity and momentum equations as a pre-conditioner was taken into account in our study. A fifth-order Runge-Kutta scheme has been used for marching in time. The local time stepping and implicit residual smoothing were applied as the convergence acceleration techniques. The convective fluxes have been calculated by a Roe like high-order flux splitting scheme. The viscous and thermal conduction terms were found by an ordinary second-order technique. This method admitted high Courant-Friedrichs-Levy (CFL) numbers and revealed a good convergence rate and accuracy to conquer the wakes within applied range of Reynolds numbers for cross flow around a horizontal circular cylinder with heat transfer as a case study chosen in this investigation. The obtained results were compared with available benchmark data in literature and showed a high consensus with them.