[en] Uncertainty quantification of multiphysics systems represents numerous mathematical and computational challenges. Indeed, uncertainties that arise in each physics in a fully coupled system must be captured throughout the whole system, the so-called curse of dimensionality. We present techniques for mitigating the curse of dimensionality in network-coupled multiphysics systems by using the structure of the network to transform uncertainty representations as they pass between components. Examples from the simulation of nuclear power plants will be discussed.
Disciplines :
Mechanical engineering
Author, co-author :
Phipps, Eric; Sandia National Laboratories
Arnst, Maarten ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Computational and stochastic modeling
Constantine, Paul; Stanford University
Ghanem, Roger; University of Southern California > Department of Civil and Environmental Engineering
Wildey, Tim; Sandia National Laboratories
Language :
English
Title :
Stochastic Dimension Reduction Techniques for Uncertainty Quantification of Multiphysics Systems