TY - GEN
T1 - Parallel implicit DNS of Rayleigh-Taylor instability
AU - Yilmaz, I.
AU - Edis, F. O.
AU - Saygin, H.
PY - 2012
Y1 - 2012
N2 - We present a three-dimensional DNS study of Rayleigh-Taylor instability using a fully implicit, non-dissipative and discrete kinetic energy conserving algorithm. In order to perform this study, an in-house, fully parallel, finite-volume, DNS solver, iDNS-PETSc, which solves the set of time-dependent, compressible Navier-Stokes equations with gravity was developed based on the present algorithm and the PETSc parallel library. The effects of the compressibility on the development of the instability and mixing were also studied. It is shown that the algorithm is able to capture the correct physics of the instability and turbulent mixing. The compressibility (i.e., high Mach number) found more effective on the development of the flow after the diffusive growth phase passed. An increase in bubble growth rate together with a decrease in turbulent mixing was also observed at Mach number 1.1.
AB - We present a three-dimensional DNS study of Rayleigh-Taylor instability using a fully implicit, non-dissipative and discrete kinetic energy conserving algorithm. In order to perform this study, an in-house, fully parallel, finite-volume, DNS solver, iDNS-PETSc, which solves the set of time-dependent, compressible Navier-Stokes equations with gravity was developed based on the present algorithm and the PETSc parallel library. The effects of the compressibility on the development of the instability and mixing were also studied. It is shown that the algorithm is able to capture the correct physics of the instability and turbulent mixing. The compressibility (i.e., high Mach number) found more effective on the development of the flow after the diffusive growth phase passed. An increase in bubble growth rate together with a decrease in turbulent mixing was also observed at Mach number 1.1.
KW - DNS
KW - Implicit
KW - Parallel
KW - Rayleigh-taylor instability
UR - https://www.scopus.com/pages/publications/84871637821
M3 - Conference contribution
AN - SCOPUS:84871637821
SN - 9783950353709
T3 - ECCOMAS 2012 - European Congress on Computational Methods in Applied Sciences and Engineering, e-Book Full Papers
SP - 8342
EP - 8360
BT - ECCOMAS 2012 - European Congress on Computational Methods in Applied Sciences and Engineering, e-Book Full Papers
T2 - 6th European Congress on Computational Methods in Applied Sciences and Engineering, ECCOMAS 2012
Y2 - 10 September 2012 through 14 September 2012
ER -