TY - GEN
T1 - High-order implicit discontinuous galerkin scheme for unsteady turbulent flows
AU - Asada, Hiroyuki
AU - Kawai, Soshi
N1 - Funding Information:
This work and submission are supported by Research Fellowships of Japan Society for the Promotion of Science for Young Scientists. The present code is based on the second-order accurate DG-CRI scheme developed by K. Yasue in Japan Aerospace Exploration Agency (JAXA).
Publisher Copyright:
© 2017 by Hiroyuki Asada and Soshi Kawai.
PY - 2017
Y1 - 2017
N2 - A new implicit time integration scheme for unsteady turbulent flow computations with high-order discontinuous Galerkin (DG) methods is proposed. In the newly proposed implicit scheme, algebraic equations are directly and independently solved without sweeps to exploit a compactness of the DG methods. On computations of an inviscid Taylor-Green vortex problem, the sweep-free implicit gives well agreed time evolution with an explicit time integration and conventional global implicit time integration scheme, a LU-SGS scheme. Additionally, the estimated computational cost of the sweep-free implicit scheme is lower than of the LU-SGS scheme.
AB - A new implicit time integration scheme for unsteady turbulent flow computations with high-order discontinuous Galerkin (DG) methods is proposed. In the newly proposed implicit scheme, algebraic equations are directly and independently solved without sweeps to exploit a compactness of the DG methods. On computations of an inviscid Taylor-Green vortex problem, the sweep-free implicit gives well agreed time evolution with an explicit time integration and conventional global implicit time integration scheme, a LU-SGS scheme. Additionally, the estimated computational cost of the sweep-free implicit scheme is lower than of the LU-SGS scheme.
UR - http://www.scopus.com/inward/record.url?scp=85017205317&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85017205317&partnerID=8YFLogxK
U2 - 10.2514/6.2017-0739
DO - 10.2514/6.2017-0739
M3 - Conference contribution
AN - SCOPUS:85017205317
T3 - AIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting
BT - AIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting
PB - American Institute of Aeronautics and Astronautics Inc.
T2 - 55th AIAA Aerospace Sciences Meeting
Y2 - 9 January 2017 through 13 January 2017
ER -