4 papers
Lagrangian velocity statistics of homogeneous isotropic turbulence in dilute polymer solutions
Yusuke Koide, Susumu Goto
We conduct direct numerical simulations of homogeneous isotropic turbulence in dilute polymer solutions to investigate the Lagrangian velocity statistics. We show how polymers modu…
Multifractal sets of coherent and incoherent vortices in turbulence
Susumu Goto, Daiki Watanabe, Tsuyoshi Yoneda
We numerically verify multifractal theory (Frisch and Parisi 1985) for turbulence using simulation data at a high Reynolds number. First, we propose a simple method to directly est…
Attenuation mechanism of wall-bounded turbulence by heavy finite-size particles
Yutaro Motoori, Susumu Goto
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 f…
Relationship between the power spectral density of the Lagrangian velocity and the hierarchy of coherent vortices in turbulence
Yusuke Koide, Susumu Goto
We conduct direct numerical simulations of developed turbulence in a periodic cube to investigate the formation mechanism of the power spectral density of the Lagrangian velocity.…