1.1k citations · 1.4k across the 43 of their papers we have counts for
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From concrete mixture to structural design -- a holistic optimization procedure in the presence of uncertainties
Atul Agrawal, Erik Tamsen, Phaedon-Stelios Koutsourelakis +1
Designing civil structures such as bridges, dams or buildings is a complex task requiring many synergies from several experts. Each is responsible for different parts of the proces…
Model bias identification for Bayesian calibration of stochastic digital twins of bridges
Daniel Andrés Arcones, Martin Weiser, Phaedon-Stelios Koutsourelakis +1
Simulation-based digital twins must provide accurate, robust and reliable digital representations of their physical counterparts. Quantifying the uncertainty in their predictions p…
Multi-fidelity Constrained Optimization for Stochastic Black Box Simulators
Atul Agrawal, Kislaya Ravi, Phaedon-Stelios Koutsourelakis +1
Constrained optimization of the parameters of a simulator plays a crucial role in a design process. These problems become challenging when the simulator is stochastic, computationa…
Physics-Informed Tensor Basis Neural Network for Turbulence Closure Modeling
Leon Riccius, Atul Agrawal, Phaedon-Stelios Koutsourelakis
Despite the increasing availability of high-performance computational resources, Reynolds-Averaged Navier-Stokes (RANS) simulations remain the workhorse for the analysis of turbule…
A probabilistic, data-driven closure model for RANS simulations with aleatoric, model uncertainty
Atul Agrawal, Phaedon-Stelios Koutsourelakis
We propose a data-driven, closure model for Reynolds-averaged Navier-Stokes (RANS) simulations that incorporates aleatoric, model uncertainty. The proposed closure consists of two…
Interpretable reduced-order modeling with time-scale separation
Sebastian Kaltenbach, Phaedon-Stelios Koutsourelakis, Petros Koumoutsakos
Partial Differential Equations (PDEs) with high dimensionality are commonly encountered in computational physics and engineering. However, finding solutions for these PDEs can be c…