@article{Smirnov_Zaitsev_Smirnovsky_Kolesnik_Pozhilov_2024, title={Assessment of Several Advanced Numerical Algorithms Implemented in the CFD Code SINF/Flag-S for Supercomputer Simulations}, volume={11}, url={https://superfri.org/index.php/superfri/article/view/555}, DOI={10.14529/jsfi240202}, abstractNote={<p>Computational Fluid Dynamics demands substantial computational resources and advanced numerical algorithms for accurate simulation of fundamental and industrial problems. This paper presents an experience in assessing several numerical algorithms implemented recently into the in-house finite-volume code SINF/Flag-S developed at the Peter the Great St. Petersburg Polytechnic University for supercomputer simulation. Three topics are covered: (i) implementation and testing of an original geometric multigrid method for solving linear algebraic equations; (ii) application of a fractional step method for solving unsteady incompressible fluid motion equations; and (iii) description and testing of a density-based solver for compressible gas viscous flow simulation across a wide Mach number range. For each of the topics considered, the results of the calculations of some testing problems are presented, namely: a model problem of heat transfer in a cubic domain, turbulent Rayleigh–Bénard convection in a slightly tilted cylindrical container, free convective flow around a subsea cooler model, high-speed gas flow with strong effects of viscous-inviscid interaction. The parallel efficiency of the implemented algorithms is demonstrated, and their significance for large-scale simulations on supercomputers is highlighted.</p>}, number={2}, journal={Supercomputing Frontiers and Innovations}, author={Smirnov, Evgueni M. and Zaitsev, Dmitri K. and Smirnovsky, Alexander A. and Kolesnik, Elizaveta V. and Pozhilov, Aleksei A.}, year={2024}, month={Aug.}, pages={14–31} }