Ordinary-differential-equation-based nonequilibrium wall modeling for large-eddy simulation

R Kamogawa, Y Tamaki, S Kawai - Physical Review Fluids, 2023 - APS
This paper proposes an ordinary-differential-equation (ODE)-based nonequilibrium
boundary layer (NEQBL) wall modeling in large-eddy simulation (LES) for accurate …

A kinetic energy and entropy preserving (KEEP) finite volume scheme on unstructured meshes for compressible flows

Y Kuya, W Okumura, K Sawada - Journal of Computational Physics, 2023 - Elsevier
A kinetic energy and entropy preserving (KEEP) finite-volume scheme on unstructured
meshes is proposed for non-dissipative and stable compressible flow computations. The …

Wall-Modeled Large-Eddy Simulation of Transonic Buffet over NASA-CRM Using FFVHC-ACE

Y Tamaki, S Kawai - AIAA Journal, 2024 - arc.aiaa.org
This study investigates the capability of wall-modeled large-eddy simulation (WMLES) in
predicting the transonic buffet phenomenon over three-dimensional aircraft configurations at …

Wall-modeled LES of transonic buffet over NASA-CRM using Cartesian-grid-based flow solver FFVHC-ACE

Y Tamaki, S Kawai - AIAA SciTech 2023 Forum, 2023 - arc.aiaa.org
View Video Presentation: https://doi. org/10.2514/6.2023-0429. vid This study demonstrates
the capability of the wall-modeled large-eddy simulation for predicting buffet phenomena …

POD and DMD of three-dimensional transonic aircraft buffet using large-scale LES data

H Asada, S Kawai - AIAA SCITECH 2024 Forum, 2024 - arc.aiaa.org
The proper orthogonal decomposition (POD) and dynamic mode decomposition (DMD) of
three-dimensional transonic aircraft buffet using large-scale large-eddy simulation (LES) …

Physics-informed machine-learning solution to log-layer mismatch in wall-modeled large-eddy simulation

S Maejima, K Tanino, S Kawai - Physical Review Fluids, 2024 - APS
This study proposes a physics-informed machine learning to enable using the erroneous
flow data at near-wall grid points as the input to the wall model in a wall-modeled large-eddy …

[HTML][HTML] Application of proper orthogonal decomposition to flow fields around various geometries and reduced-order modeling

Y Nakamura, S Sato, N Ohnishi - Computer Methods in Applied Mechanics …, 2024 - Elsevier
This study is focused on a reduced-order model (ROM) based on proper orthogonal
decomposition (POD) for unsteady flow around a stationary object, which allows prediction …

Temporal discretization for improving kinetic-energy and entropy preservation properties in KEEP schemes

H Asada, K Maruyama, S Kawai - Computers & Fluids, 2024 - Elsevier
A temporal discretization for improving kinetic-energy and entropy preservation on
compressible flow simulations is proposed. The key of the proposed scheme is to introduce …

Near-wall numerical coherent structures and turbulence generation in wall-modelled large-eddy simulation

H Maeyama, S Kawai - Journal of Fluid Mechanics, 2023 - cambridge.org
Near-wall turbulence structures and generation in the wall-modelled large-eddy simulation
(WMLES) are revealed. To elucidate the turbulence structures driving a near-wall turbulence …

[HTML][HTML] Quantum annealing-based algorithm for lattice gas automata

Y Kuya, K Komatsu, K Yonaga, H Kobayashi - Computers & Fluids, 2024 - Elsevier
This study proposes a quantum annealing-based algorithm for flow computation based on
lattice-gas automata (LGA). Since the state of the lattice gas is determined by Boolean …