Typical individual quantities in direct numerical simulations of statistically steady flows are converging at a rate of 1/T⁠, where T is the averaging time of the simulation. However, global quantities that represent the integral momentum balance in the computational domain can exhibit a faster convergence rate of 1/T. This faster convergence rate is analysed and explained. Theoretical predictions are supported with a direct numerical simulation.

Topics
Error analysis, Computational fluid dynamics, Statistical analysis
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© 2018 Author(s).
2018
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