Parallel implicit DNS of temporally-evolving turbulent shear layer instability
Journal article, 2014

In this study, a temporally-evolving incompressible and compressible Turbulent Shear Layer (TSL) instability problem is solved using an all-speed (all-Mach), implicit, non-dissipative and kinetic energy conserving algorithm. An in-house, fully parallel, finite-volume Direct Numerical Simulation (DNS) solver was developed using PETSc. Convergence characteristics at low-Mach numbers were also improved using a relaxation procedure. We aim here to assess the performance and behavior of the present algorithm for complex flows which contain multi-scale physics and gradually evolve into turbulence. The results show that the algorithm is able to produce correct physical mechanisms and capture the evolution of the turbulent fluctuations for both incompressible and compressible cases. It is observed that the non-dissipative and kinetic energy conserving properties make the algorithm powerful and applicable to challenging problems. For higher Mach numbers, a shock-capturing or a dissipative mechanism is required for robustness. © 2013 Elsevier B.V. All rights reserved.


I yilmas

Istanbul Technical University (ITÜ)

Istanbul Aydın University

o edis

Istanbul Technical University (ITÜ)

H saygin

Istanbul Aydın University

Lars Davidson

Chalmers, Applied Mechanics, Fluid Dynamics

Journal of Computational and Applied Mathematics

0377-0427 (ISSN)

Vol. 259 PART B 651-659

Driving Forces

Sustainable development

Areas of Advance




C3SE (Chalmers Centre for Computational Science and Engineering)

Subject Categories

Fluid Mechanics and Acoustics



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