Version 1
: Received: 17 September 2024 / Approved: 18 September 2024 / Online: 23 September 2024 (13:18:46 CEST)
How to cite:
Lysenko, D. A. Large Eddy Simulation of the Flow past a Circular Cylinder at Re=130,000: Effects of Numerical Platforms and Single- and Double-Precision Arithmetic. Preprints2024, 2024091735. https://doi.org/10.20944/preprints202409.1735.v1
Lysenko, D. A. Large Eddy Simulation of the Flow past a Circular Cylinder at Re=130,000: Effects of Numerical Platforms and Single- and Double-Precision Arithmetic. Preprints 2024, 2024091735. https://doi.org/10.20944/preprints202409.1735.v1
Lysenko, D. A. Large Eddy Simulation of the Flow past a Circular Cylinder at Re=130,000: Effects of Numerical Platforms and Single- and Double-Precision Arithmetic. Preprints2024, 2024091735. https://doi.org/10.20944/preprints202409.1735.v1
APA Style
Lysenko, D. A. (2024). Large Eddy Simulation of the Flow past a Circular Cylinder at Re=130,000: Effects of Numerical Platforms and Single- and Double-Precision Arithmetic. Preprints. https://doi.org/10.20944/preprints202409.1735.v1
Chicago/Turabian Style
Lysenko, D. A. 2024 "Large Eddy Simulation of the Flow past a Circular Cylinder at Re=130,000: Effects of Numerical Platforms and Single- and Double-Precision Arithmetic" Preprints. https://doi.org/10.20944/preprints202409.1735.v1
Abstract
Numerical simulations of the sub-critical flow past a circular cylinder at the Reynolds number, Re=130,000 are performed using two numerical platforms, commercial, Ansys Fluent and open source, OpenFoam (finite volume method and large eddy simulation based on a differential equation for the sub-grid kinetic energy). An overview of the available experimental data and similar large eddy simulation studies is presented. A detailed analysis of all accumulated data demonstrates satisfactory agreement between them with a dispersion of the order of 10% (for the main integral flow parameters). A detailed comparison of the results obtained by single- and double-precision numerical methods using Ansys Fluent did not reveal any noticeable discrepancies for the integral and local flow parameters, as well as spectral characteristics. It is shown that the behavior of the dynamic system of the fluid dynamic equations computed with single precision is stable by Lyapunov and does not lead to any loss of accuracy. The reconstructed attractors of the dynamic systems in the phase space are limited by an ellipsoid.
Keywords
large-eddy simulation; circular cylinder; floating point precision; computational fluid dynamics
Subject
Physical Sciences, Mathematical Physics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
