5 papers
On the Reynolds-number scaling of Poisson solver complexity
F. Xavier Trias, Ãdel Alsalti-Baldellou, Assensi Oliva
We aim to answer the following question: is the complexity of numerically solving the Poisson equation increasing or decreasing for very large simulations of incompressible flows?…
Exploiting repeated matrix block structures for more efficient CFD on modern supercomputers
Josep Plana-Riu, F. Xavier Trias, Ãdel Alsalti-Baldellou +3
Computational Fluid Dynamics (CFD) simulations are often constrained by the memory-bound nature of sparse matrix-vector operations, which eventually limits performance on modern hi…
An efficient eigenvalue bounding method: CFL condition revisited
F. Xavier Trias, Xavier Ãlvarez-Farré, Ãdel Alsalti-Baldellou +2
Direct and large-eddy simulations of turbulence are often solved using explicit temporal schemes. However, this imposes very small time-steps because the eigenvalues of the (linear…
Quantifying the checkerboard problem to reduce numerical dissipation
Johannes Arend Hopman, Daniel Santos, Ãdel Alsalti-Baldellou +2
This work provides a comprehensive exploration of various methods in solving incompressible flows using a projection method, and their relation to the occurrence and management of…
A multigrid reduction framework for domains with symmetries
Ãdel Alsalti-Baldellou, Carlo Janna, Xavier Ãlvarez-Farré +1
Divergence constraints are present in the governing equations of numerous physical phenomena, and they usually lead to a Poisson equation whose solution represents a bottleneck in…