Publications

Peer-reviewed work organized around computational problems, not just chronology

The common thread across these papers is not a single method family but a repeated objective: make complex PDE-based workflows more computationally workable, more scalable, and easier to move toward actual use.

Featured

Reduced basis solvers for unfitted methods on parameterized domains

N. Mueller, S. Badia, Y. Zhao. Computer Methods in Applied Mechanics and Engineering, 2026.

This paper addresses one of the harder deployment barriers in reduced-order modelling: geometric variation. The approach combines unfitted methods with reduced basis ideas so parameterized geometries can be handled without the usual remeshing burden.

Parameterized domains Unfitted FEM Reduced basis

Theme 1

Model reduction that survives computational scale

Papers in this track deal with the cost of approximation spaces, compression, hyper-reduction, and implementation choices that matter once problem sizes become real.

Theme 2

Scientific software as a delivery mechanism

The software paper is included here not as documentation of a codebase, but as part of the technical argument for making methods accessible and extensible.

2025

GridapROMs.jl: Efficient reduced order modelling in the Julia programming language

N. Mueller, S. Badia. Computer Physics Communications, 109985.

Turns reduced-order techniques into a reusable software layer with an emphasis on interpretability, extensibility, and computational efficiency in Julia.

Scientific software DOI

2025

A tensor-train reduced basis solver for parameterized partial differential equations on Cartesian grids

N. Mueller, Y. Zhao, S. Badia, T. Cui. Journal of Computational and Applied Mathematics, 472, 116790.

Shows how tensor-train structure can reduce basis construction and operator approximation costs without giving away too much robustness.

Tensor methods DOI

2024

Model order reduction with novel discrete empirical interpolation methods in space-time

N. Mueller, S. Badia. Journal of Computational and Applied Mathematics, 444, 115767.

Develops space-time interpolation ideas for transient reduced models where the cost of residual and Jacobian handling is usually the limiting factor.

Space-time ROM DOI

2024

Space-time reduced basis methods for parametrized unsteady Stokes equations

R. Tenderini, N. Mueller, S. Deparis. SIAM Journal on Scientific Computing, 46(1).

Extends space-time reduced basis approaches to unsteady flow settings and provides part of the groundwork for later transient-model work.

Unsteady flow DOI