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Article Dans Une Revue Computers and Fluids Année : 2017

Uncertainty quantification in littoral erosion

Résumé

We aim at quantifying the impact of flow state uncertainties in lit-toral erosion to provide confidence bounds on deterministic predictions of bottom morphodynamics. Two constructions of the bathymetry standard deviation are discussed. The first construction involves directional quantile-based extreme scenarios using what is known on the flow state Probability Density Function (PDF) from on site observations. We compare this construction to a second cumulative one using the gradient by adjoint of a functional involving the energy of the system. These ingredients are illustrated for two models for the interaction between a soft bed and a flow in a shallow domain. Our aim is to keep the computational complexity comparable to the deterministic simulations taking advantage of what already available in our simulation toolbox.
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hal-01391204 , version 1 (03-11-2016)

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Bijan Mohammadi. Uncertainty quantification in littoral erosion. Computers and Fluids, 2017, 143, pp.120-133. ⟨10.1016/j.compfluid.2016.10.017⟩. ⟨hal-01391204⟩
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