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• W3089971981 abstract "Efficient Robust Design Optimization (RDO) strategies coupling a parsimonious uncertainty quantification (UQ) method with a surrogate-based multi-objective genetic algorithm (SMOGA) are investigated for a test problem in computational fluid dynamics (CFD), namely the inverse robust design of an expansion nozzle. The low-order statistics (mean and variance) of the stochastic cost function are computed through either a gradient-enhanced kriging (GEK) surrogate or through the less expensive, lower fidelity, first-order method of moments (MoM). Both the continuous (non-intrusive) and discrete (intrusive) adjoint methods are evaluated for computing the gradients required for GEK and MoM. In all cases, the results are assessed against a reference kriging UQ surrogate not using gradient information. Subsequently, the GEK and MoM UQ solvers are fused together to build a multi-fidelity surrogate with adaptive infill enrichment for the SMOGA optimizer. The resulting hybrid multi-fidelity SMOGA RDO strategy ensures a good tradeoff between cost and accuracy, thus representing an efficient approach for complex RDO problems." @default.
• W3089971981 created "2020-10-08" @default.
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• W3089971981 date "2020-09-30" @default.
• W3089971981 modified "2023-09-28" @default.
• W3089971981 title "Multi-Fidelity Gradient-Based Strategy for Robust Optimization in Computational Fluid Dynamics" @default.
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• W3089971981 doi "https://doi.org/10.3390/a13100248" @default.
• W3089971981 hasPublicationYear "2020" @default.
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