Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1103/PhysRevFluids.6.064304

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： DOI: 10.1103/PhysRevFluids.5.014604

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.7566/JPSJ.88.124401

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： https://doi.org/10.1016/j.jcp.2019.04.008

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1103/PhysRevFluids.4.024611

Language：English   Publishing type：Research paper (scientific journal)  

DOI： https://doi.org/10.1051/proc/201863280

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： https://doi.org/10.1103/PhysRevFluids.3.104601

Language：English   Publishing type：Research paper (scientific journal)  

DOI： DOI:https://doi.org/10.1103/PhysRevE.97.033109

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1103/PhysRevE.96.063119

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1080/14685248.2017.1284326

Language：English   Publishing type：Research paper (scientific journal)  

DOI： http://dx.doi.org/10.1051/proc/201653003

Language：English  

DOI： doi:10.5047/forma.2015.s011

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1063/1.4921210

Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.1299/transjsme.2014tep0361

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： DOI:10.1080/03091929.2012.654790

Authorship：Lead author   Language：English  

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： DOI: 10.1103/PhysRevE.85.066313

Language：English   Publishing type：Research paper (scientific journal)  

DOI： doi:10.1088/1742-6596/318/7/072035

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (scientific journal)  

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1017/jfm.2011.74

Language：English   Publishing type：Research paper (scientific journal)  

DOI： http://dx.doi.org/10.1051/proc/2011014

Language：English  

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

Two nonlinear filtering methods for extracting coherent structures from direct numerical simulation data of isotropic turbulence are compared. One is based on the orthonormal wavelet decomposition, called coherent vortex extraction (CVE) method, and the other is based on the Fourier decomposition, called Fourier nonlinear filtering (FNF) method. We examine contributions of structures extracted by applying these methods to turbulent flows. Coherent structures extracted by using the CVE method, reconstructed from only 3.6 % of the degrees of freedom, preserve the vortex tubes as well as statistical quantities of turbulence. In contrast, the structures extracted by using the FNF method, represented by 7.3 % of the degrees of freedom, only well preserve low-order statistical quantities, e.g., energy, enstrophy and the energy spectrum in the inertial range, but smooth out the vortex tubes.

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

A method for extracting coherent vorticity sheets and current sheets out of three-dimensional homogeneous magnetohydrodynamic (MHD) turbulence is proposed, which is based on the orthogonal wavelet decomposition of the vorticity and current density fields. Thresholding the
wavelet coefficients allows both fields to be split into coherent and incoherent parts. The fields to be analyzed are obtained by direct numerical simulation (DNS) of forced incompressible MHD turbulence without mean magnetic field, using a classical Fourier spectral method at a resolution of
512^3. Coherent vorticity sheets and current sheets are extracted from the DNS data at a given time instant. It is found that the coherent vorticity and current density preserve both the vorticity sheets and the current sheets present in the total fields while retaining only a few percent of the degrees of freedom. The incoherent vorticity and current density are shown to be structureless and of mainly dissipative nature. The spectral distributions of kinetic and magnetic energies of the coherent fields
only differ in the dissipative range, while the corresponding incoherent fields exhibit near-equipartition of energy. The probability distribution functions of total and coherent fields for both vorticity and current density coincide almost perfectly, while the incoherent fields have
strongly reduced variances. Studying the energy flux confirms that the nonlinear dynamics is fully captured by the coherent fields only.

Authorship：Lead author   Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

Fully developed homogeneous isotropic turbulent fields, computed by direct numerical simulation, are
compared to divergence-free random fields having the same energy spectrum and either the same helicity
spectrum as that of the turbulent data, or vanishing helicity. We show that the scale-dependent velocity flatness
quantifies the spatial variability of the energy spectrum. The flatness exhibits a substantial increase at small
scales for the turbulent field, but remains constant for the random fields. A diagnostic, the scale-dependent
helicity, is proposed to quantify the geometrical statistics of the flow, which shows that only the turbulent flow
is intermittent. Finally, statistical scale-dependent analyses of both Eulerian and Lagrangian accelerations
confirm the inherently different dynamics of turbulent and random flows.

Authorship：Lead author   Language：English  

Language：English  

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

Language：English  

We examine statistics of wavelet-based transfer of wavelet-based energy at location i and scale R to all scales smaller than r (<= R) in high Reynolds number homogeneous isotropic turbulence. An emphasis is put on scale locality
of energy flux constructed from the wavelet-based transfer.

Authorship：Lead author   Language：English  

We examine small-scale statistics of energy transfer from a scale within grid
scales to subgrid scales localized in space and scale in high Reynolds number
fully developed turbulence. An orthonormal wavelet decomposition method
is applied to data of three-dimensional incompressible homogeneous isotropic
turbulence with Taylor microscale Reynolds number 471. We find that the
energy transfer and the kinetic energy localized in space and scale have strong
correlation in the inertial subrange though they are almost uncorrelated in the
dissipation range. The correlation is enhanced by the positive values for the
transfer, while it is reduced by the negative values for the transfer.

Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

Authorship：Lead author   Language：English  

We examine influence of linear dynamics of inertial waves on coherent vortices formation in homogenous rotating turbulence by numerical simulation. An emphasis is put on the influence on asymmetry between cyclonic and anticyclonic vortices. Scale-dependences of the asymmetry and the influence are also discussed.

Authorship：Lead author   Language：English  

A wavelet-based method to extract coherent vortices is applied to data of
three-dimensional incompressible homogeneous isotropic turbulence with the
Taylor micro-scale Reynolds number 471 in order to examine contribution of
the vortices to statistics on the turbulent flow. We observe a strong scaleby-
scale correlation between the velocity field induced by them and the total
velocity field over the scales retained by the data.We also find that the vortices
almost preserve statistics of nonlinear interactions of the total flow over the
inertial range.

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

Coherent vortices are extracted from data obtained by direct numerical simulation DNS of
three-dimensional homogeneous isotropic turbulence performed for different Taylor microscale
Reynolds numbers, ranging from Re=167 to 732, in order to study their role with respect to the
flow intermittency. The wavelet-based extraction method assumes that coherent vortices are what
remain after denoising, without requiring any template of their shape. Hypotheses are only made on
the noise that, as the simplest guess, is considered to be additive, Gaussian, and white. The vorticity
vector field is projected onto an orthogonal wavelet basis, and the coefficients whose moduli are
larger than a given threshold are reconstructed in physical space, the threshold value depending on
the enstrophy and the resolution of the field, which are both known a priori. The DNS dataset,
computed with a dealiased pseudospectral method at resolutions N=2563 , 5123 , 10243, and 20483,
is analyzed. It shows that, as the Reynolds number increases, the percentage of wavelet coefficients
representing the coherent vortices decreases; i.e., flow intermittency increases. Although the number
of degrees of freedom necessary to track the coherent vortices remains small e.g., 2.6% of N
=20483 for Re=732, it preserves the nonlinear dynamics of the flow. It is thus conjectured that
using the wavelet representation the number of degrees of freedom to compute fully developed
turbulent flows could be reduced in comparison to the standard estimation based on Kolmogorov's
theory.

Authorship：Lead author   Language：English  

Statistics of kinetic energy and transfer localized in space and scale are examined by using the datasets of high-resolution direct numerical simulations of three-dimensional incompressible homogeneous isotropic turbulence with the Taylor micro-scale Reynolds number up to 732. We find that the standard deviation spectra of the local energy σe and that of energy transfer σt decrease with a representative wavenumber k approximately as σe ∝ k^{−5/3} and σt ∝ k^{−1/2} in the inertial subrange, respectively.

Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

Authorship：Lead author   Language：English  

A wavelet-based method to extract coherent vortices is applied to data
obtained by direct numerical simulations of three-dimensional incompressible homogeneous
isotropic turbulence for different Taylor microscale Reynolds numbers,
ranging from Rλ = 167 to 732. We find that the coherent vortices well preserve
statistics of the total flow. The incoherent flow is structureless and noise like. The
percentage of wavelet coefficients representing the coherent vortices decreases as the
Reynolds number increases.

Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

Event date： 2023.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京農工大学　小金井キャンパス   Country：Japan  

Event date： 2022.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン  

Event date： 2022.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：福井  

Event date： 2022.7 - 2022.8

Language：English   Presentation type：Oral presentation (general)  

Event date： 2022.7

Language：English   Presentation type：Oral presentation (general)  

Venue：Osaka, Japan (Online)   Country：Japan  

Event date： 2022.6

Language：English   Presentation type：Oral presentation (general)  

Venue：Lyon, France   Country：France  

Event date： 2022.3

Language：Japanese   Presentation type：Oral presentation (invited, special)  

Venue：京都大学   Country：Japan  

Event date： 2021.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2021.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2021.10

Language：English   Presentation type：Oral presentation (general)  

Venue：Sendai, MIyagi   Country：Japan  

Event date： 2020.11

Language：English   Presentation type：Oral presentation (general)  

Venue：Virtual, Chicago, USA   Country：United States  

Event date： 2019.12

Language：English   Presentation type：Oral presentation (general)  

Venue：Berlin   Country：Germany  

Event date： 2019.12

Language：English   Presentation type：Oral presentation (invited, special)  

Country：Germany  

Event date： 2019.11

Language：English   Presentation type：Oral presentation (general)  

Venue：the Washington State Convention Center in Seattle, Washington, USA   Country：United States  

Event date： 2019.11

Language：English   Presentation type：Oral presentation (general)  

Venue：the Washington State Convention Center in Seattle, Washington, USA   Country：United States  

Event date： 2019.11

Language：English   Presentation type：Oral presentation (keynote)  

Venue：JASMSTEC, Yokohama   Country：Japan  

Event date： 2019.11

Language：English   Presentation type：Oral presentation (general)  

Venue：Nagoya, Japan   Country：Japan  

Event date： 2019.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：電通大, 調布   Country：Japan  

Event date： 2019.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Torino, Italy   Country：Italy  

Event date： 2019.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Torino, Italy   Country：Italy  

Event date： 2019.7

Language：English   Presentation type：Oral presentation (general)  

Venue：Valencia, Spain   Country：Spain  

Event date： 2019.6

Language：English   Presentation type：Oral presentation (general)  

Venue：Paris   Country：France  

Event date： 2019.6

Language：English   Presentation type：Oral presentation (keynote)  

Venue：Marseille, France   Country：France  

Event date： 2018.11

Language：English   Presentation type：Oral presentation (general)  

Venue：Atlanta, GA, USA   Country：United States  

Event date： 2018.11

Language：English   Presentation type：Oral presentation (general)  

Venue：Atlanta, GA, USA   Country：United States  

Event date： 2018.11

Language：English   Presentation type：Poster presentation  

Country：Japan  

Event date： 2018.10 - 2018.11

Language：Japanese   Presentation type：Poster presentation  

Venue：仙台   Country：Japan  

Event date： 2018.10

Language：English   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2018.10

Language：English   Presentation type：Poster presentation  

Venue：Big Island, Hawaii, USA   Country：Japan  

Event date： 2018.9

Language：Japanese   Presentation type：Poster presentation  

Venue：名古屋   Country：Japan  

Event date： 2018.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Vienna, Austria   Country：Japan  

Event date： 2018.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Vienna, Austria   Country：Japan  

Event date： 2018.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：大阪大学   Country：Japan  

Event date： 2018.9

Language：English   Presentation type：Poster presentation  

Venue：Birmingham, UK   Country：Japan  

Event date： 2018.6

Language：English   Presentation type：Oral presentation (invited, special)  

Venue：Nara, Japan   Country：Japan  

Event date： 2018.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京理科大学（野田キャンパス）   Country：Japan  

Event date： 2018.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：早稲田大学西早稲田キャンパス   Country：Japan  

Event date： 2018.3

Language：English   Presentation type：Oral presentation (general)  

Venue：Nagoya University, Japan   Country：Japan  

Event date： 2017.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：京都工芸繊維大学　松ヶ崎キャンパス, 京都   Country：Japan  

Event date： 2017.11

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：浜松, 静岡   Country：Japan  

Event date： 2017.11

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：浜松, 静岡   Country：Japan  

Event date： 2017.11

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：浜松, 静岡   Country：Japan  

Event date： 2017.11

Language：English   Presentation type：Oral presentation (general)  

Venue：Denver, Colorado, USA   Country：Japan  

Event date： 2017.11

Language：Japanese   Presentation type：Oral presentation (invited, special)  

Venue：機械振興会館, 東京都   Country：Japan  

Event date： 2017.9 - 2017.10

Language：English   Presentation type：Oral presentation (general)  

Venue：Nagoya University, Nagoya, Japan   Country：Japan  

Event date： 2017.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：岩手大学上田キャンパス   Country：Japan  

Event date： 2017.9 - 2017.10

Language：English   Presentation type：Oral presentation (general)  

Venue：Nagoya University, Nagoya, Japan   Country：Japan  

Event date： 2017.8 - 2017.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京理科大学　葛飾キャンパス   Country：Japan  

Event date： 2017.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Stockholm, Sweden   Country：Sweden  

Event date： 2017.7

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：京大 数理解析研究所   Country：Japan  

Event date： 2017.7

Language：English   Presentation type：Poster presentation  

Venue：Strasbourg, France   Country：France  

Event date： 2017.7

Language：English   Presentation type：Poster presentation  

Venue：Strasbourg, France   Country：France  

Event date： 2017.7

Language：Japanese   Presentation type：Poster presentation  

Venue：北海道大学   Country：Japan  

Event date： 2017.7

Language：Japanese   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

Venue：北海道大学   Country：Japan  

Event date： 2017.6

Language：English   Presentation type：Oral presentation (general)  

Venue：Hawaii Preparatory Academy, Waimea, Big Island, Hawaii   Country：United States  

Event date： 2017.6

Language：English   Presentation type：Oral presentation (general)  

Venue：Hawaii Preparatory Academy, Waimea, Big Island, Hawaii   Country：United States  

Event date： 2017.3

Language：Japanese   Presentation type：Oral presentation (invited, special)  

Venue：京都大学 吉田キャンパス本部構内 国際科学イノベーション棟 ５Fシンポジウムホール   Country：Japan  

Event date： 2017.3

Language：Japanese   Presentation type：Oral presentation (invited, special)  

Venue：パシフィコ横浜   Country：Japan  

Event date： 2017.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：パシフィコ横浜   Country：Japan  

Event date： 2016.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：下呂温泉 温泉旅館会館   Country：Japan  

Event date： 2016.11

Language：English   Presentation type：Oral presentation (general)  

Venue：Portland Oregon, USA   Country：United States  

Event date： 2016.8

Language：English   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2016.8

Language：Japanese   Presentation type：Oral presentation (invited, special)  

Venue：東京工業大学大岡山キャンパス   Country：Japan  

Event date： 2016.7

Language：English   Presentation type：Oral presentation (invited, special)  

Country：United Kingdom  

Event date： 2016.7

Language：English   Presentation type：Oral presentation (invited, special)  

Country：Japan  

Event date： 2016.4

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：名古屋大学   Country：Japan  

Event date： 2015.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東工大 大岡山キャンパス   Country：Japan  

Event date： 2015.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東工大 大岡山キャンパス   Country：Japan  

Event date： 2015.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：甲南大学, 神戸   Country：Japan  

Event date： 2015.6 - 2015.7

Language：English   Presentation type：Oral presentation (general)  

Country：Australia  

Event date： 2015.5

Language：English   Presentation type：Oral presentation (invited, special)  

Country：Japan  

Turbulence is ubiquitous in our daily life. Most vorticity in fully developed turbulence at high Reynolds number resides at small scales in the so-called energy dissipation range, while most turbulent kinetic energy is at the scales in the so-called energy containing range that is at scales much larger than those in the dissipation range. We first examine the influence of small-scale vortex dynamics and structure on turbulence statistics at large scales without chemical reaction, using so-called computational surgery. It is found that the statistics at large scale are insensitive to the details of the vortex dynamics and structure, at least in the case studied here. The insensitivity is quite encouraging to turbulent models, e.g., large eddy simulation which computes only the large-scale evolution, while modeling the influence of small-scale motion onto the large-scale motion. For turbulence with combustion, its small-scale vortex dynamics are very active, because the chemical reaction occurs at smaller scales. This suggests the difficulty of modeling turbulent combustion. Its dynamics and structure play important roles in enhancement/suppression of the reaction.

Event date： 2015.3

Language：English   Presentation type：Poster presentation  

Country：United States  

Event date： 2014.12

Language：English   Presentation type：Oral presentation (invited, special)  

Country：Japan  

Event date： 2014.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：タワーホール船堀、東京   Country：Japan  

Event date： 2014.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：タワーホール船堀、東京   Country：Japan  

Event date： 2014.11

Language：English   Presentation type：Oral presentation (general)  

Country：United States  

Event date： 2014.11

Language：English   Presentation type：Oral presentation (general)  

Country：United States  

Event date： 2014.10

Language：English   Presentation type：Oral presentation (invited, special)  

Country：France  

Event date： 2014.9

Language：English   Presentation type：Oral presentation (general)  

Country：Denmark  

Event date： 2014.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：中部大学（春日井キャンパス）   Country：Japan  

Event date： 2014.7

Language：English   Presentation type：Oral presentation (invited, special)  

Country：United Kingdom  

Event date： 2013.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：名古屋大学   Country：Japan  

Event date： 2013.11

Language：English   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2013.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京農工大学 小金井キャンパス   Country：Japan  

Event date： 2013.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京農工大学 小金井キャンパス   Country：Japan  

Event date： 2013.9

Language：English   Presentation type：Oral presentation (invited, special)  

Country：Tunisia  

Event date： 2013.9

Language：English   Presentation type：Oral presentation (invited, special)  

Country：Tunisia  

Event date： 2013.9

Language：English   Presentation type：Oral presentation (general)  

Country：France  

Event date： 2012.12

Language：English   Presentation type：Oral presentation (invited, special)  

Country：Japan  

Event date： 2012.11

Language：English   Presentation type：Oral presentation (general)  

Venue：San Diego, California   Country：United States  

Event date： 2012.9

Language：English   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2012.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：高知大学　朝倉キャンパス   Country：Japan  

Event date： 2012.9

Language：English   Presentation type：Oral presentation (general)  

Country：Austria  

Event date： 2012.1

Language：Japanese   Presentation type：Oral presentation (invited, special)  

Country：Japan  

Event date： 2011.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：大阪大学　吹田キャンパス   Country：Japan  

Event date： 2011.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：大阪大学　吹田キャンパス   Country：Japan  

Event date： 2011.11

Language：English   Presentation type：Oral presentation (general)  

Country：United States  

Event date： 2011.11

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学応用力学研究所   Country：Japan  

Event date： 2011.11

Language：English   Presentation type：Poster presentation  

Country：Japan  

Event date： 2011.9

Language：English   Presentation type：Poster presentation  

Country：France  

Event date： 2011.9

Language：English   Presentation type：Oral presentation (general)  

Country：Poland  

Event date： 2011.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：首都大学東京 南大沢キャンパス   Country：Japan  

Event date： 2010.12

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2010.11

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2010.10

Language：Japanese   Presentation type：Oral presentation (invited, special)  

Country：Japan  

Event date： 2010.9

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

3次元非圧縮性一様等方乱流における、ウェーブレット解析に基づく情報縮約化手法の開発、大規模数値計算による検証を行った。
開発した手法は直接数値計算に比べ約10分の1の自由度しか保持してないにもかかわらず、エネルギースペクトル、エネルギー流束などの統計量の時間発展だけでなくチューブ状の渦構造もよく再現することがわかった。

Event date： 2010.9

Language：Japanese   Presentation type：Oral presentation (invited, special)  

Country：Japan  

Event date： 2010.6

Language：English   Presentation type：Oral presentation (general)  

Country：Portugal  

Event date： 2010.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2009.11

Language：English   Presentation type：Oral presentation (general)  

Venue： Minneapolis, Minnesota  

Coherent vortex simulation based on the wavelet filtered Navier-Stokes equations are presented for three-dimensional
decaying isotropic turbulence. Different strategies
for choosing the safety zone are tested and their influence on the precision and efficiency is assessed. We show that
an adequate choice allows to reduce the number of degrees of freedom by a factor 6 with respect to direct numerical
simulation, while preserving the high order statistics of the flow.

Event date： 2009.11

Language：English   Presentation type：Oral presentation (general)  

Event date： 2009.10

Language：English   Presentation type：Oral presentation (invited, special)  

Event date： 2009.10

Language：English   Presentation type：Oral presentation (invited, special)  

Event date： 2009.10

Language：Japanese   Presentation type：Poster presentation  

Country：Japan  

Event date： 2009.9

Language：English   Presentation type：Oral presentation (general)  

Event date： 2009.9

Language：English   Presentation type：Poster presentation  

Event date： 2009.6

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2009.3

Language：Japanese   Presentation type：Poster presentation  

Country：Japan  

Event date： 2008.12

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2008.11

Language：English   Presentation type：Poster presentation  

Country：Japan  

Event date： 2008.11

Language：English   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2008.11

Language：English   Presentation type：Oral presentation (general)  

Venue：San Antonio, Texas, USA  

Event date： 2008.11

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2008.11

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2008.9

Language：English   Presentation type：Oral presentation (invited, special)  

Event date： 2008.9

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2008.4

Language：English   Presentation type：Oral presentation (invited, special)  

Event date： 2007.9

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2007.9

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

三次元一様等方性乱流大規模直接数値計算データベース（格子点数256^3,テイラーマイクロスケールレイノルズ数R_\lambda=167から2048^3 R_\lambda=732）のウェーブレットフィルタリングにより、渦度場から秩序・無秩序渦度場を抽出し、その役割及びレイノルズ数依存性を調べた。

Event date： 2007.6

Language：English   Presentation type：Oral presentation (general)  

Event date： 2007.3

Language：Japanese   Presentation type：Poster presentation  

Country：Japan  

Event date： 2007.2

Language：Japanese   Presentation type：Poster presentation  

Country：Japan  

Event date： 2006.12

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2006.11

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

三次元一様等方性乱流の大規模直接数値計算データを用いて行なった，スケールαでの局所エネルギー，スケールαからスケールβ以下への局所エネルギー伝達のウェーブレット解析の結果について報告する．

Event date： 2006.9

Language：English   Presentation type：Poster presentation  

Country：Japan  

Event date： 2006.9

Language：English   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2006.9

Language：Japanese   Presentation type：Poster presentation  

Country：Japan  

Event date： 2006.3

Language：Japanese   Presentation type：Poster presentation  

Country：Japan  

Event date： 2005.11

Language：English   Presentation type：Oral presentation (general)  

Event date： 2005.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2004.12

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

ベクトル解析、常微分方程式の演習を担当

連続体の力学演習を担当

計算機実験の一部を担当

ベクトル解析、常微分方程式の演習を担当

連続体の力学演習を担当

計算機実験の一部を担当した

計算機実験の一部を担当

計算機実験の一部を担当した