Zobrazeno 1 - 10
of 629
pro vyhledávání: '"Goto Susumu"'
Autor:
Motoori, Yutaro, Goto, Susumu
To elucidate the attenuation mechanism of wall-bounded turbulence due to heavy small particles, we conduct direct numerical simulations (DNS) of turbulent channel flow laden with finite-size solid particles. When particles cannot follow the swirling
Externí odkaz:
http://arxiv.org/abs/2410.01192
Publikováno v:
Journal of Fluid Mechanics, 984, R4, 2024
Nonlinear machine learning for turbulent flows can exhibit robust performance even outside the range of training data. This is achieved when machine-learning models can accommodate scale-invariant characteristics of turbulent flow structures. This st
Externí odkaz:
http://arxiv.org/abs/2402.17990
We investigate the physical-space locality of interactions in three-dimensional incompressible turbulent flow. To that, we modify the nonlinear terms of the vorticity equation such that the vorticity field is advected and stretched by the locally ind
Externí odkaz:
http://arxiv.org/abs/2308.07255
Data assimilation (DA) reconstructing small-scale turbulent structures is crucial for forecasting and understanding turbulence. This study proposes a theoretical framework for DA based on ideas from chaos synchronization, in particular, the transvers
Externí odkaz:
http://arxiv.org/abs/2307.05941
Publikováno v:
J. Fluid Mech. (2021), vol. 919, A9
We study the correlation function and mean linear response function of the velocity Fourier mode of statistically steady-state, homogeneous and isotropic turbulence in the Eulerian and Lagrangian coordinates through direct numerical simulation (DNS).
Externí odkaz:
http://arxiv.org/abs/2204.13435
Autor:
Oka, Sunao, Goto, Susumu
To investigate the attenuation of turbulence in a periodic cube due to the addition of spherical solid particles, we conduct direct numerical simulations using an immersed boundary method with resolving flow around each particle. Numerical results wi
Externí odkaz:
http://arxiv.org/abs/2201.12743
We attempt to formulate the simplest possible model mimicking turbulent dynamics, such as quasi-cyclic behaviour (QCB), using only three variables. To this end, we first conduct direct numerical simulations of three-dimensional flow driven by the ste
Externí odkaz:
http://arxiv.org/abs/2112.03417
Publikováno v:
BMC Proceedings, Vol 5, Iss Suppl 7, p P92 (2011)
Externí odkaz:
https://doaj.org/article/c517d9c1ccd14a168f945b5090308ac5
Energy transfers from larger to smaller scales in turbulence. This energy cascade is a process of the creation of smaller-scale coherent vortices by larger ones. In our recent study (Yoneda, Goto and Tsuruhashi 2021), we reformulated the energy casca
Externí odkaz:
http://arxiv.org/abs/2109.09997
Mathematical reformulation of the Kolmogorov-Richardson energy cascade in terms of vortex stretching
In this paper, with the aid of direct numerical simulations (DNS) of forced turbulence in a periodic domain, we mathematically reformulate the Kolmogorov-Richardson energy cascade in terms of vortex stretching. By using the description, we prove that
Externí odkaz:
http://arxiv.org/abs/2105.12459