Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Evaluation of the statistical convergence of turbulent flow data
Submission Author:
João Rodrigo Andrade , MG , Brazil
Co-Authors:
Ramon Martins, Roney Thompson, Aristeu Silveira Neto, Gilmar MOMPEAN, João Rodrigo Andrade
Presenter: João Rodrigo Andrade
doi://10.26678/ABCM.COBEM2017.COB17-0527
Abstract
Direct numerical simulations (DNS) provide useful information for the understanding and the modeling of turbulent phenomena. However, quantifying the errors associated with DNS is an important challenge to the scientific community. Recently, Thompson et al. (Computers & Fluids, 2016) presented a methodology to evaluate the statistical errors of the second-moment DNS data of Newtonian fluid flows. The authors applied the methodology to several channel flow databases available in the literature. In the present work, we follow the main idea of Thompson et al. (Computers & Fluids, 2016) to evaluate the statistical errors of Newtonian fluid channel and pipe flows. The present analysis was made by using data generated with the quasi-spectral code by Thais et al. (Computers & Fluids, 2011) for several friction Reynolds number. The simulation time necessary to reach the statistically converged fields is characterized as a function of the Reynolds number, comparisons with other authors results are established.
Keywords
direct numerical simulation, statistical convergence, Turbulence, turbulence-induced vibration, plane channel flow
