Abstract
In this paper, verification and validation analysis for pulsatile flow in a straight pipe is presented. Numerical results were obtained using the finite volume method, and optimum grid density was determined using the Grid Convergence Index (GCI) calculation for the steady flow case. Based on the GCI calculation procedure we have developed a similar calculation for Time Convergence Index for the unsteady simulations. Transient computations were performed to obtain time dependent solutions of pulsating flow using three dierent time-steps and TCI was calculated to check time-step convergence. The numerical solution for the unsteady case was verified by comparing with accurate analytical solutions of Navier-Stokes equations for the pulsating flow in a pipe. Finally the numerical results were validated with experimental data. The results indicate that there is good agreement between the present results and analytical and experimental solutions. This paper stands as a good example for verification studies of unsteady CFD simulations where we have shown that TCI calculation can be applied in a similar procedure to grid convergence index calculation.
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