TY - GEN
T1 - Wall-modeled large-eddy simulations on non-body-conforming cartesian grids
T2 - AIAA Scitech Forum, 2020
AU - Tamaki, Yoshiharu
AU - Takaki, Ryoji
AU - Kawai, Soshi
N1 - Funding Information:
This work is supported in part by MEXT as a social and scientific priority issue (Development of Innovative Design and Production Processes that lead the Way for the Manufacturing Industry in the Near Future) to be tackled by using post-K computer. A part of this research uses computational resources of the K computer provided by the RIKEN Advanced Institute for Computational Science (project ID: hp150254, hp160205, hp170267, hp180185, hp190164).
PY - 2020
Y1 - 2020
N2 - To realize wall-modeled large-eddy simulations on Cartesian grids, a wall-boundary condition for non-body-conforming grids is developed. A slip-wall velocity boundary condition is introduced to reduce the error of the conservation law caused by the under-resolved velocity profile near the wall boundary. Corresponding to the slip velocity, the stress balance near the wall boundary is analyzed. To satisfy the stress balance, an anisotropic expression of the viscous-stress tensor is introduced that tends not to inhibit the wall-normal mixing by the turbulence. In the simulation of the flat-plate turbulent boundary layer, the result obtained by the developed wall-boundary condition shows a significant improvement from the results using the non-slip boundary condition in predicting both velocity and Reynolds shear stress profiles in the boundary layer.
AB - To realize wall-modeled large-eddy simulations on Cartesian grids, a wall-boundary condition for non-body-conforming grids is developed. A slip-wall velocity boundary condition is introduced to reduce the error of the conservation law caused by the under-resolved velocity profile near the wall boundary. Corresponding to the slip velocity, the stress balance near the wall boundary is analyzed. To satisfy the stress balance, an anisotropic expression of the viscous-stress tensor is introduced that tends not to inhibit the wall-normal mixing by the turbulence. In the simulation of the flat-plate turbulent boundary layer, the result obtained by the developed wall-boundary condition shows a significant improvement from the results using the non-slip boundary condition in predicting both velocity and Reynolds shear stress profiles in the boundary layer.
UR - http://www.scopus.com/inward/record.url?scp=85092378958&partnerID=8YFLogxK
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U2 - 10.2514/6.2020-2066
DO - 10.2514/6.2020-2066
M3 - Conference contribution
AN - SCOPUS:85092378958
SN - 9781624105951
T3 - AIAA Scitech 2020 Forum
BT - AIAA Scitech 2020 Forum
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
Y2 - 6 January 2020 through 10 January 2020
ER -