TY - GEN
T1 - High-order cellwise relaxation implicit discontinuous galerkin scheme for unsteady flow computations
AU - Asada, Hiroyuki
AU - Kawai, Soshi
AU - Sawada, Keisuke
N1 - Publisher Copyright:
© 2016, American Institute of Aeronautics and Astronautics Inc, AIAA, All rights reserved.
PY - 2016
Y1 - 2016
N2 - A performance of high-order Cellwise Relaxation Implicit Discontinuous Galerkin (DG-CRI) scheme on unsteady ow computation is investigated. The inviscid Taylor-Green vortex is first computed to demonstrate the capability of the high-order DG-CRI scheme on the homogeneous turbulence computation. The higher-order DG-CRI scheme gives better resolved small vortex structures, which is well indicated in the later decay of the kinetic energy and the higher enstrophy. In addition, the effects of the CFL number and the number of inner iterations are discussed by comparing with the results by explicit time integration. Then, the high-order DG method is applied for the LES computation of the turbulent channel ow, and the advantages of the high-order DG method in predicting accurate turbulent statistics are shown.
AB - A performance of high-order Cellwise Relaxation Implicit Discontinuous Galerkin (DG-CRI) scheme on unsteady ow computation is investigated. The inviscid Taylor-Green vortex is first computed to demonstrate the capability of the high-order DG-CRI scheme on the homogeneous turbulence computation. The higher-order DG-CRI scheme gives better resolved small vortex structures, which is well indicated in the later decay of the kinetic energy and the higher enstrophy. In addition, the effects of the CFL number and the number of inner iterations are discussed by comparing with the results by explicit time integration. Then, the high-order DG method is applied for the LES computation of the turbulent channel ow, and the advantages of the high-order DG method in predicting accurate turbulent statistics are shown.
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U2 - 10.2514/6.2016-1335
DO - 10.2514/6.2016-1335
M3 - Conference contribution
AN - SCOPUS:85007529348
SN - 9781624103933
T3 - 54th AIAA Aerospace Sciences Meeting
BT - 54th AIAA Aerospace Sciences Meeting
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - 54th AIAA Aerospace Sciences Meeting, 2016
Y2 - 4 January 2016 through 8 January 2016
ER -