Fast stencil computations using fast Fourier transforms

Z Ahmad, R Chowdhury, R Das, P Ganapathi… - Proceedings of the 33rd …, 2021‏ - dl.acm.org
Stencil computations are widely used to simulate the change of state of physical systems
across a multidimensional grid over multiple timesteps. The state-of-the-art techniques in …

Recent advances in a Cartesian solver for industrial LES

R Lohner, A Figueroa, A Degro - AIAA Scitech 2019 Forum, 2019‏ - arc.aiaa.org
This paper summarizes the major improvements and developments that have taken place
during the last year for FDFLO, a cartesian flow solver designed for industrial LES …

Overnight industrial LES for external aerodynamics

R Löhner, C Othmer, M Mrosek, A Figueroa, A Degro - Computers & Fluids, 2021‏ - Elsevier
This paper summarizes the efforts carried out over the last year to achieve overnight
industrial Large-Eddy Simulation (LES) runs for external car aerodynamics. The solver …

An embedded strategy for the analysis of fluid structure interaction problems

SD Costarelli, L Garelli, MA Cruchaga, MA Storti… - Computer Methods in …, 2016‏ - Elsevier
A Navier–Stokes solver based on Cartesian structured finite volume discretization with
embedded bodies is presented. Fluid structure interaction with solid bodies is performed …

Comparison of lattice-Boltzmann and finite difference solvers

R Lohner, AT Corrigan, KR Wichmann… - 52nd Aerospace Sciences …, 2014‏ - arc.aiaa.org
Lattice-Boltzmann methods (LBMs) have improved considerably over the last three decades.
For low Mach-number flows, such as those found in external aerodynamics and …

A fast algorithm for aperiodic linear stencil computation using Fast Fourier Transforms

Z Ahmad, R Chowdhury, R Das, P Ganapathi… - ACM Transactions on …, 2023‏ - dl.acm.org
Stencil computations are widely used to simulate the change of state of physical systems
across a multidimensional grid over multiple timesteps. The state-of-the-art techniques in …

On the achievable speeds of finite difference solvers on CPUs and GPUs

R Lohner, AT Corrigan, KR Wichmann… - 21st AIAA Computational …, 2013‏ - arc.aiaa.org
A Finite Difference code for the weakly compressible Navier-Stokes equations has been
developed. The code was then ported to the graphical processing unit (GPU) using the …

Postprocessing‐based interpolation schemes for nested Cartesian finite difference grids of different size

A Figueroa, R Löhner - International Journal for Numerical …, 2019‏ - Wiley Online Library
Nested Cartesian grid systems by design require interpolation of solution fields from coarser
to finer grid systems. While several choices are available, preserving accuracy, stability, and …

A portable OpenCL-based unstructured edge-based finite element Navier–Stokes solver on graphics hardware

R Rossi, F Mossaiby, SR Idelsohn - Computers & Fluids, 2013‏ - Elsevier
The rise of GPUs in modern high-performance systems increases the interest in porting
portion of codes to such hardware. The current paper aims to explore the performance of a …

GPGPU implementation of the BFECC algorithm for pure advection equations

SD Costarelli, MA Storti, RR Paz, LD Dalcin… - Cluster computing, 2014‏ - Springer
In the present work an implementation of the Back and Forth Error Compensation and
Correction (BFECC) algorithm specially suited for running on General-Purpose Graphics …