2025
T. Akao, T. Watanabe, K. Nagata
Spanwise confinement effects on a stably stratified shear layer
Journal of Thermal Science and Technology 25-00210 2025
Y. Xie, X. Xiong, Y. Zheng, K. Nagata, T. Watanabe, Y. Zhou
Scaling law of the Kolmogorov constants in turbulent flow with external intermittency
Journal of Fluid Mechanics 1019 A30 2025
T. Watanabe, M. Haneda, Y. Sugino, K. Nagata, K. Inokuma, A. Sasoh
Attenuation of weak spherical shock waves in an accelerating flow
Physics of Fluids 37 086180 2025
J. Li, K. Nagata, T. Watanabe
Large-eddy simulation of low Reynolds number flow around airfoils with suction and ejection slits
International Journal of Aeronautical and Space Sciences 60 1-14 2025
T. Watanabe, T. Nishizaki, T. Furuta, K. Nagata
Direct numerical simulations of multiple swirling jets issued into a crossflow
Physics of Fluids 37 085215 2025
T. Akao, T. Watanabe, K. Nagata
Streamwise confinement effects in a temporally developing stably stratified shear layer
Physics of Fluids 37 085127 2025
T. Watanabe, T. Inagaki, T. Mori, K. Ishizawa, K. Nagata
Direct numerical simulations of the interaction of temporally evolving circular jets
Journal of Fluid Mechanics 1009 A68 2025
T. Watanabe, K. Nagata
Influences of small-scale shear instability on passive scalar mixing in a shear-free turbulent front
Journal of Fluid Mechanics 1008 A20 2025
T. Watanabe, H. Abreu, K. Nagata, C. B. da Silva
Small-scale shear layers in isotropic turbulence of viscoelastic fluids
Journal of Fluid Mechanics 1005 A14 2025
2024
T. Watanabe
Enhancement of passive scalar mixing in a shear-free turbulent front
Proceedings of the IUTAM Symposium on Turbulent/Non-Turbulent Interface in Turbulent Shear Flows 45 79-93 2024
J. Li, K. Nagata, T. Watanabe
Aerodynamic characteristics of airfoils with fractal structures in low-Reynolds-number regime
CEAS Aeronautical Journal 16 17-32 2024
T. Watanabe, T. Mori, K. Ishizawa, K. Nagata
Scale dependence of local shearing motion in decaying turbulence generated by multiple-jet interaction
Journal of Fluid Mechanics, 997 A14 2024
J. Xing, T. Watanabe, K. Nagata
Hybrid large eddy simulation and Lagrangian simulation of a compressible turbulent planar jet with a chemical reaction
International Journal for Numerical Methods, 96 962-990 2024
T. Watanabe
Efficient enhancement of turbulent entrainment by small-scale shear instability
Journal of Fluid Mechanics, 988 A20 2024
J. Xing, T. Watanabe, K. Nagata
LES/Lagrangian-particle-simulation of a supersonic reactive turbulent planar jet
Journal of Fluids Engineering, 146 070902 2024
T. Mori, T. Watanabe, K. Nagata
Nearly homogeneous and isotropic turbulence generated by the interaction of supersonic jets
Experiments in Fluids, 65 947 2024
2023
R. Enoki, T. Watanabe, K. Nagata
Statistical properties of shear and non-shear velocity components in isotropic turbulence and turbulent jets
Physical Review Fluids, 8 104602 2023
M. Zecchetto, T. Watanabe, K. Nagata, C. B. da Silva
Turbulent/non-turbulent interfaces in equilibrium and non-equilibrium regions in the absence of mean shear
International Journal of Heat and Fluid Flow, 103 109198 2023
Y. Zheng, N. Koto, K. Nagata, T. Watanabe
Unsteady dissipation scaling of grid turbulence in the near-field region
Physics of Fluids, 35 095131 2023
A. Kusuhata, K. Tanaka, T. Watanabe, K. Nagata, A. Sasoh
Local geometry of a weak normal shock wave interacting with turbulence
Physics of Fluids, 35 086110 2023
P. D. Tung, T. Watanabe, K. Nagata
LES investigation of a piston-driven synthetic jet actuator with multiple orifices
CFD Letters, 16 1998-2009 2023
J. Li, K. Nagata, T. Watanabe
Large-eddy simulation of low-Reynolds-number flow around partially porous airfoils
Journal of Aircraft, 60 1-12 2023
T. Watanabe, K. Nagata
The response of small-scale shear layers to perturbations in turbulence
Journal of Fluid Mechanics, 963 A31 2023
X. Zhang, T. Watanabe, K. Nagata
Reynolds number dependence of the turbulent/non-turbulent interface in temporally developing turbulent boundary layers
Journal of Fluid Mechanics, 964 A8 2023
K. Nakamura, T. Watanabe, K. Nagata
Turbulent/turbulent interfacial layers of a shearless turbulence mixing layer in temporally evolving grid turbulence
Physics of Fluids, 35 045117 2023
P. D. Tung, T. Watanabe, K. Nagata
Large-eddy simulation of a flow generated by a piston-driven synthetic jet actuator
CFD Letters, 15 1-18 2023
Y. Zheng, K. Nakamura, K. Nagata, T. Watanabe
Unsteady dissipation scaling in static and active grid turbulence
Journal of Fluid Mechanics 956 A20 2023
2022
K. Nakamura, T. Matsushima, Y. Zheng, K. Nagata, T. Watanabe
Large- and small-scale characteristics in a temporally developing shearless turbulent mixing layer
Physics of Fluids, 34 115117 2022
T. Watanabe, K. Nagata
Energetics and vortex structures near small-scale shear layers in turbulence
Physics of Fluids, 34 059114 2022
T. Watanabe, Y. Zheng, K. Nagata
The decay of stably stratified grid turbulence in a viscosity-affected stratified flow regime
Journal of Fluid Mechanics, 946 A29 2022
K. Inokuma, T. Maeda, T. Watanabe, K. Nagata
Diaphragmless shock tube with multiple air-operated valves
Experiments in Fluids, 63 121 2022
T. Akao, T. Watanabe, K. Nagata
Vertical confinement effects on a fully developed turbulent shear layer
Physics of Fluids, 34 055129 2022
K. Yamamoto, T. Ishida, T. Watanabe, K. Nagata
Experimental and numerical investigation of compressibility effects on velocity derivative flatness in turbulence
Physics of Fluids, 34 055101 2022
K. Yamamoto, T. Watanabe, K. Nagata
Turbulence generated by an array of opposed piston-driven synthetic jet actuators
Experiments in Fluids, 63 35 2022
2021
Y. Zheng, K. Nagata, T. Watanabe
Turbulent characteristics and energy transfer in the far field of active-grid turbulence
Physics of Fluids, 33 115119 2021
T. Watanabe, K. Nagata
Large-scale characteristics of a stably stratified turbulent shear layer
Journal of Fluid Mechanics, 927 A27 2021
T. Watanabe, K. Tanaka, K. Nagata
Solenoidal linear forcing for compressible, statistically steady, homogeneous isotropic turbulence with reduced turbulent Mach number oscillation
Physics of Fluids, 33 095108 2021
K. Inokuma,T. Watanabe, K. Nagata, Y. Sakai
Experimental study on shock wave modulation caused by velocity and temperature fluctuations in-cylinder wake
Physical Review Fluids, 6 063401 2021
M. Hayashi, T. Watanabe, K. Nagata
Characteristics of small-scale shear layers in a temporally evolving turbulent planer jet
Journal of Fluid Mechanics, 920 A38 2021
T. Katagiri, T. Watanabe, K. Nagata
Statistical properties of a model of a turbulent patch arising from a breaking internal wave
Physics of Fluids, 33 055107 2021
M. Hayashi, T. Watanabe, K. Nagata
The relation between shearing motions and the turbulent/non-turbulent interface in a turbulent planar jet
Physics of Fluids, 33 055126 2021
Y. Zheng, K. Nagata, T. Watanabe
Energy dissipation and enstrophy production/destruction at very low Reynolds numbers in the final stage of the transition period of decay in grid turbulence
Physics of Fluids, 33 035147 2021
Y. Tai, T. Watanabe, K. Nagata
Multi-particle models of molecular diffusion for Lagrangian simulation coupled with LES for passive scalar mixing in compressible turbulence
Computers and Fluids, 221 104886 2021
Y. Tai, T. Watanabe, K. Nagata
Implicit large eddy simulation of passive scalar transfer in compressible planar jet
International Journal for Numerical Methods in Fluids, 93 1183-1198 2021
T. Matsushima, K. Nagata, T. Watanabe
Wavelet analysis of shearless turbulent mixing layer
Physics of Fluids, 33 025109 2021
2020
T. Watanabe, C. B, da Silva, K. Nagata
Scale-by-scale kinetic energy budget near the turbulent/non-turbulent interface
Physical Review Fluids, 5 124610 2020
Y. Zhou, K. Nagata, Y. Sakai, T. Watanabe, Y. Ito, T. Hayase
Energy transfer in turbulent flows behind two side-by-side square cylinders
Journal of Fluid Mechanics, 903 A4 2020
K. Tanaka, T. Watanabe, K. Nagata
Statistical analysis of deformation of a shock wave propagating in a local turbulent region
Physics of Fluids, 32 096107 2020
T. Watanabe, K. Tanaka, K. Nagata
Characteristics of shearing motions in incompressible isotropic turbulence
Physical Review Fluids, 5 072601(R) 2020
K. Aruga, T. Watanabe, K. Nagata
Color contamination correction based on light intensity correlation in two-color, double-exposure particle tracking velocimetry
Experiments in Fluids, 61 142 2020
K. Aruga, K. Inokuma, T. Watanabe, K. Nagata, Y. Sakai
Experimental investigation of interactions between turbulent cylinder wake and spherical shock wave
Physics of Fluids, 32 16101 2020
R. Nagata, T. Watanabe, K. Nagata, C. B. da Silva
Triple decomposition of velocity gradient tensor in homogeneous isotropic turbulence
Computer & Fluids, 198 104389 2020
2019
T. Watanabe, X. Zhang, K. Nagata
Direct numerical simulation of incompressible turbulent boundary layers and planar jets at high Reynolds numbers initialized with implicit large eddy simulation
Computer & Fluids, 194 104314 2019
T. Watanabe, J. J. Riley, K. Nagata, K. Matsuda, R. Onishi
Hairpin vortices and highly elongated flow structures in a stably-stratified shear layer
Journal of Fluid Mechanics, 878 37-61 2019
K. Inokuma, T. Watanabe, K. Nagata, Y. Sakai
Statistics of overpressure fluctuations behind a weak shock wave interacting with turbulence
Physics of Fluids, 31 085119 2019
T. Watanabe, C. B. da Silva, K. Nagata
Non-dimensional energy dissipation rate near the turbulent/non-turbulent interfacial layer in free shear flows and shear free turbulence
Journal of Fluid Mechanics, 875 321-344 2019
Y. Zhou, K. Nagata, Y. Sakai, T. Watanabe
Extreme events and non-Kolmogorov -5/3 spectra in turbulent flows behind two side-by-side square cylinders
Journal of Fluid Mechanics, 874 677-698 2019
S. Tanaka, T. Watanabe, K. Nagata
Multi-particle model of coarse-grained scalar dissipation rate with volumetric tensor in turbulence
Journal of Computational Physics 389(15) 128-146 2019
K. Inokuma, T. Watanabe, K. Nagata, Y. Sakai
Statistical properties of spherical shock waves propagating through grid turbulence, turbulent cylinder wake, and laminar flow
Physica Scripta 94(4) 044004 2019
X. Zhang, T. Watanabe, K. Nagata
Passive scalar mixing near turbulent/non-turbulent interface in compressible turbulent boundary layers
Physica Scripta 94(4) 044002 2019
2018
Y. Zhou, K. Nagata, Y. Sakai, T. Watanabe
Dual-plane turbulent jets and their non-Gaussian velocity fluctuations
Physical Review Fluids 3(12) 124604 2018
T. Watanabe, K. Nagata
Integral invariants and decay of temporally developing grid turbulence
Physics of Fluids 30(10) 105111 2018
R. Nagata, T. Watanabe, K. Nagata
Turbulent/non-turbulent interfaces in temporally-evolving compressible planar jets
Physics of Fluids 30(10) 105109 2018
X. Zhang, T. Watanabe, K. Nagata
Turbulent/non-turbulent interfaces in high resolution direct numerical simulation of temporally-evolving compressible turbulent boundary layers
Physical Review Fluids 3(9) 094605 2018
T. Watanabe, J. J. Riley, K. Nagata, R. Onishi, K. Matsuda
A localized turbulent mixing layer in a uniformly stratified environment
Journal of Fluid Mechanics 849 245-276 2018
H. Sakakibara, T. Watanabe, K. Nagata
Supersonic piston synthetic jets with single/multiple orifice
Experiments in Fluids 59(5) 76 2018
Y. Tai, T. Watanabe, K. Nagata
Modeling of molecular diffusion and thermal conduction with multi-particle interaction in compressible turbulence
Physics of Fluids 30(3) 035108 2018
K. Tanaka, T. Watanabe, K. Nagata, A. Sasoh, Y. Sakai, T. Hayase
Amplification and attenuation of shock wave strength caused by homogeneous isotropic turbulence
Physics of Fluids 30(3) 035105 2018
T. Watanabe, X. Zhang, K. Nagata
Turbulent/non-turbulent interfaces detected in DNS of incompressible turbulent boundary layers
Physics of Fluids 30(3) 035102 2018
2017
T. Watanabe, J. J. Riley, K. Nagata
Turbulent entrainment across turbulent/non-turbulent interfaces in stably stratified mixing layers
Physical Review Fluids 2(10) 104803 2017
T. Watanabe, K. Nagata
Gradients estimation from random points with volumetric tensor in turbulence
Journal of Computational Physics 350 518-529 2017
T. Watanabe, R. Jaulino, R. R. Taveira, C. B. da Silva, K. Nagata, Y. Sakai
Role of an isolated eddy near the turbulent/non-turbulent interface
Physical Review Fluids 2(9) 094607 2017
T. Watanabe, C. B. da Silva, K. Nagata, Y. Sakai
Geometrical aspects of turbulent/non-turbulent interfaces with and without mean shear
Physics of Fluids 29(8) 085105 2017
K. Inokuma, T. Watanabe, K. Nagata, A. Sasoh, Y. Sakai
Finite response time of shock wave modulation by turbulence
Physics of Fluids 29(5) 051701 2017
2016
T. Watanabe, C. B. da Silva, K. Nagata
Multi-particle dispersion during entrainment in turbulent free-shear flows
Journal of Fluid Mechanics 805(R1) R1-12 2016
T. Watanabe, K. Nagata
Mixing model with multi-particle interactions for Lagrangian simulations of turbulent mixing
Physics of Fluids 28(8) 19 2016
T. Watanabe, J. J. Riley, K. Nagata
Effects of stable stratification on turbulent/non-turbulent interfaces in turbulent mixing layers
Physical Review Fluids 1(4) 044301 2016
T. Watanabe, K. Nagata
LES-Lagrangian-particles-simulation of turbulent reactive flows at high Sc number using approximate deconvolution model
AIChE Journal 62(8) 2912-2922 2016
T. Watanabe, J. J. Riley, S. M. de Bruyn Kops, P. J. Diamessis, Q. Zhou
Turbulent/non-turbulent interfaces in wakes in stably-stratified fluids
Journal of Fluid Mechanics 797(R1) 1-11 2016
T. Watanabe, Y. Sakai, K. Nagata, Y. Ito, T. Hayase
Implicit large eddy simulation of a scalar mixing layer in fractal grid turbulence
Physica Scripta 91(7) 74007 2016
T. Watanabe, C. B. da Silva, Y. Sakai, K. Nagata, T. Hayase
Lagrangian properties of the entrainment across turbulent/non-turbulent interface layers
Physics of Fluids 28(3) 031701 2016
T. Watanabe, Y. Sakai, K. Nagata, Y. Ito
Large eddy simulation study of turbulent kinetic energy and scalar variance budgets and turbulent/non-turbulent interface in planar jets
Fluid Dynamics Research 48(2) 21407 2016
2015
T. Watanabe, Y. Sakai, K. Nagata, Y. Ito, T. Hayase
LES-Lagrangian particle method for turbulent reactive flows based on the approximate deconvolution model and mixing model
Journal of Computational Physics 294 127-148 2015
T. Watanabe, Y. Sakai, K. Nagata, Y. Ito, T. Hayase
Turbulent mixing of passive scalar near turbulent and non-turbulent interface in mixing layers
Physics of Fluids 27 085109 2015
T. Watanabe, Y. Sakai, K. Nagata, O. Terashima, T. Kubo
Conditional statistics in a planar liquid jet with a second-order chemical reaction
International Journal of Heat and Mass Transfer 83, 768-780 2015
T. Watanabe, T. Naito, Y. Sakai, K. Nagata, Y. Ito
Mixing and chemical reaction at high Schmidt number near turbulent/nonturbulent interface in planar liquid jet
Physics of Fluids 27 035114 2015
2014
T. Watanabe, Y. Sakai, K. Nagata, Y. Ito, T. Hayase
Reactive scalar field near the turbulent/non-turbulent interface in a planar jet with a second-order chemical reaction
Physics of Fluids 26 105111 2014
T. Watanabe, Y. Sakai, K. Nagata, Y. Ito, T. Hayase
Enstrophy and passive scalar transport near the turbulent/non-turbulent interface in a turbulent planar jet flow
Physics of Fluids 26 105103 2014
T. Watanabe, Y. Sakai, K. Nagata, Y. Ito, T. Hayase
Vortex stretching and compression near the turbulent/nonturbulent interface in a planar jet
Journal of Fluid Mechanics 758 754-785 2014
T. Watanabe, Y. Sakai, K. Nagata, O. Terashima
Turbulent Schmidt number and eddy diffusivity change with a chemical reaction
Journal of Fluid Mechanics 754 98-121 2014
T. Watanabe, Y. Sakai, K. Nagata, Y. Ito, T. Hayase
Wavelet analysis of coherent vorticity near the turbulent/non-turbulent interface in a turbulent planar jet
Physics of Fluids 26 095105 2014
T. Watanabe, Y. Sakai, K. Nagata, O. Terashima
Experimental study on the reaction rate of a second-order chemical reaction in a planar liquid jet
AIChE Journal 60 3969-3988 2014
2013
T. Watanabe, Y. Sakai, K. Nagata, O. Terashima
Joint statistics between velocity and reactive scalar in a turbulent liquid jet with a chemical reaction
Physica Scripta T155 014039 2013
T. Watanabe, Y. Sakai, K. Nagata, O. Terashima, H. Suzuki, T. Hayase, Y. Ito
Visualization of turbulent reactive jet by using direct numerical simulation
International Journal of Modeling, Simulation, and Scientific Computing 4 1341001 2013
2012
T. Watanabe, Y. Sakai, K. Nagata, O. Terashima, T. Kubo
Simultaneous measurements of reactive scalar and velocity in a planar liquid jet with a second-order chemical reaction
Experiments in Fluids 53 1369-1383 2012