Parallel implicit DNS of temporally-evolving turbulent shear layer instability
Artikel i vetenskaplig tidskrift, 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.

Författare

I yilmas

Istanbul Teknik Universitesi

Istanbul Aydin Universitesi

o edis

Istanbul Teknik Universitesi

H saygin

Istanbul Aydin Universitesi

Lars Davidson

Chalmers, Tillämpad mekanik, Strömningslära

Journal of Computational and Applied Mathematics

0377-0427 (ISSN)

Vol. 259 PART B 651-659

Drivkrafter

Hållbar utveckling

Styrkeområden

Transport

Energi

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)

Ämneskategorier

Strömningsmekanik och akustik

DOI

10.1016/j.cam.2013.04.002