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- W4225697685 abstract "In this work we focus on reducing the wall clock time required to compute statistical estimators of highly chaotic incompressible flows on high performance computing systems. Our approach consists of replacing a single long-term simulation by an ensemble of multiple independent realizations, which are run in parallel with different initial conditions. A failure probability convergence criteria must be satisfied by the statistical estimator of interest to assess convergence. Its error analysis leads to the identification of two error contributions: the initialization bias and the statistical error. We propose an approach to systematically detect the burn-in time in order to minimize the initialization bias, accompanied by strategies to reduce simulation cost. The framework is validated on two very high Reynolds number obstacle problems of wind engineering interest in a high performance computing environment." @default.
- W4225697685 created "2022-05-05" @default.
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- W4225697685 date "2022-01-01" @default.
- W4225697685 modified "2023-10-14" @default.
- W4225697685 title "D3.3 Report of ensemble based parallelism for turbulent flows and release of solvers" @default.
- W4225697685 doi "https://doi.org/10.23967/exaqute.2022.3.06" @default.
- W4225697685 hasPublicationYear "2022" @default.
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