Work

A high-order accurate iterative Poisson solver for x3d2

Year: 2025

Type: article

Abstract: This poster presents the development of an iterative Poisson solver for the Xcompact3d framework. The development of x3d2, the next generation of the Xcompact3d solver targeting massively parallel multicore and GPU-based architectures, has included implementing distributed tridiagonal solvers. These distributed tridiagonal solvers enable a 3-D parallel decomposition of the bulk of the computation, exposing greater opportunity for parallelism than the currently used 2-D decomposition. The present FFT-based spectral Poisson solver however prevents this. In this work an iterative Poisson solver is developed for the high-order schemes employed by Xcompact3d/x3d2 and is used to demonstrate solution of the Navier-Stokes equations using a 3-D parallel decomposition for the first time in the Xcompact3d framework.

Source: Zenodo (CERN European Organization for Nuclear Research)

DOI: 10.5281/zenodo.15633110

Authors: Bartholomew, Paul, Moulinec, Charles, Weiland, Michèle, Laizet, Sylvain

Institutions: University of Edinburgh, Science and Technology Facilities Council, Imperial College London

Language: English

Topic: Computational Fluid Dynamics and Aerodynamics

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W6949359019

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