35 citations · 172 across the 17 of their papers we have counts for
10 papers · 1 filter
Inertial migration of red blood cells under a Newtonian fluid in a circular channel
Naoki Takeishi, Hiroshi Yamashita, Toshihiro Omori +3
We present a numerical analysis of the lateral movement and equilibrium radial positions of red blood cells (RBCs) with major diameter of 8 m under a Newtonian fluid in a circul…
Viscoelasticity of suspension of red blood cells under oscillatory shear flow
Naoki Takeishi, Marco Edoardo Rosti, Naoto Yokoyama +1
We present a numerical analysis of the rheology of a suspension of red blood cells (RBCs) for different volume fractions in a wall-bounded, effectively inertialess, small amplitude…
Variation of focusing patterns of laterally migrating particles in a square-tube flow due to non-Newtonian elastic force
Naoto Yokoyama, Hiroshi Yamashita, Kento Higashi +3
The elasto-inertial effects on particle focusing in a square-tube flow were investigated experimentally and numerically. Microscale experiments using spherical particles in dilute…
Energy-flux vector in anisotropic turbulence: application to rotating turbulence
Naoto Yokoyama, Masanori Takaoka
Energy flux plays a key role in the analyses of energy-cascading turbulence. In isotropic turbulence, the flux is given by a scalar as a function of the magnitude of the wavenumber…
Energy-based analysis and anisotropic spectral distribution of internal gravity waves in strongly stratified turbulence
Naoto Yokoyama, Masanori Takaoka
Stratified turbulence shows scale- and direction-dependent anisotropy and the coexistence of weak turbulence of internal gravity waves and strong turbulence of eddies. Straightforw…
Active lift inversion process of heaving wing in uniform flow by temporal change of wing kinematics
Makoto Iima, Naoto Yokoyama, Kei Senda
The transition of the vortex pattern and the lift generated by a heaving wing in a uniform flow was investigated numerically. Motivated by insects' flight maneuverability, we studi…
Integrated analysis of energy transfers in elastic-wave turbulence
Naoto Yokoyama, Masanori Takaoka
In elastic-wave turbulence, strong turbulence appears in small wave numbers while weak turbulence does in large wave numbers. Energy transfers in the coexistence of these turbulent…
Hysteretic behavior between quasi-two-dimensional flow and three-dimensional flow in forced rotating turbulence
Naoto Yokoyama, Masanori Takaoka
Conflict between formation of a cyclonic vortex and isotropization in forced homogeneous rotating turbulence is numerically investigated. It is well known that a large rotation rat…
Resonant and Near-Resonant Internal Wave Interactions
Yuri V. Lvov, Kurt L. Polzin, Naoto Yokoyama
We report evaluations of a resonant kinetic equation that suggest the slow time evolution of the Garrett and Munk spectrum is {\em not}, in fact, slow. Instead nonlinear transfers…
Nonlinear wave-wave interactions in stratified flows: Direct numerical simulations
Yuri V. Lvov, Naoto Yokoyama
To investigate the formation mechanism of energy spectra of internal waves in the oceans, direct numerical simulations are performed. The simulations are based on the reduced dynam…