Simplified Approach to Evaluate Cavitation Intensity Based on Time Information on Imposed Pressure in LiquidHiroyuki Kawashima; Hiroyuki Kogawa; Masatoshi Futakawa; Nobuatsu Tanaka, ラスト(シニア)オーサー, Cavitation damage is an important research topic in fluid–structure interactions, such as those being studied using the mercury target for the pulsed neutron source at the Materials Life Science Experimental Facility/Japan Proton Accelerator Complex. Hence, the estimation of cavitation damage (cavitation intensity) is required from the perspective of structural integrity. The results of previous studies suggest that the maximum radii of cavitation bubbles immediately prior to collapse are related to cavitation intensity. Therefore, we propose a method for estimating the maximum radius from the time information by measuring the vibrations of structure walls that are induced by collapsing cavitation bubbles in a confined liquid. In this study, we used a magnetic impact testing machine to experimentally investigate the cavitation bubble dynamics, directly observe the bubble collapsing behavior, and measure the induced vibration. We experimentally confirmed that the time information is useful in the estimation of the maximum radii of bubbles. Moreover, we theoretically derived a simple evaluation formula to estimate the maximum radius from the time responses of the imposed pressure in a confined liquid in a structure., MDPI AG
Fluids, 2024年12月06日,
［査読有り］ Study on Correlation between Pressure Time-response and Cavitation Damage
Yusuke NAKAZONO; Hiroyuki KAWASHIMA; Hiroyuki KOGAWA; Nobuatsu TANAKA; and Masatoshi FUTAKAWA, 責任著者, Japanese Society for Experimental Mechanics
International Workshop on Advanced Experimental Mechanics for Students and Young Researchers 2023 (IWAEM’23), 2023年11月, ［査読有り］
Study on impact damage caused by cavitation bubble collapse
Hiroyuki Kawashima; Hiroyuki Kogawa; Nobuatsu Tanaka and Masatoshi Futakawa, 責任著者
Advanced Technology in Experimental Mechanics and International DIC Society Joint Conference 2023 (ATEM-iDICs '23), 2023年10月, ［査読有り］
Study on damage evaluation using cavitation-bubble collapsing time
Hiroyuki Kawashima; Hiroyuki Kogawa; Masatoshi Futakawa; Nobuatsu Tanaka; ChiekoKuji; Hitoshi Soyama, 責任著者
International Conference on Multiphase Flow, 2023年04月, ［査読有り］
Spattering Behavior Induced by Cavitation Bubble Collapsing Nearby Gas-Liquid Interface
Kawashima; H.; Kurosawa; T.; Teshigawara; M.; Naoe; T.; Tanaka; N.; Futakawa; M.; Kogawa; H., 責任著者
Advanced Experimental Mechanics, 2022年08月, ［査読有り］
Experimental and Numerical Observation On Spattering Behavior Induced by Cavitation Bubble Collapsing Nearby Gas-liquid Interface
Hiroyuki KAWASHIMA; Takuma KUROSAWA; Makoto TESHIGAWARA; Takashi NAOE; Nobuatsu TANAKA and Masatoshi FUTAKAWA, 責任著者
16th International Symposium on Advanced Science and Technology in Experimental Mechanics, 2021年11月, ［査読有り］
Observation of melting metal behavior caused by high power pulsed laser injection using high speed photography technique
Yuji USHITSUKA; Makoto TESHIGAWARA; Takashi NAOE; Masatoshi FUTAKAWA; Koichi SARUTA; Toshiharu MURAMATSU; Tomonori YAMADA; Nobuatsu TANAKA; Kazuhiko YAMASAKI, 責任著者
14th International Symposium on Advanced Science and Technology in Experimental Mechanics, 2019年11月, ［査読有り］
Effect of wall boundary on growing and collapsing behaviors of cavitation bubble
S. Kawamura; T. Naoe; N. Tanaka; M. Futakawa, 責任著者
14th International Symposium on Advanced Science and Technology in Experimental Mechanics, 2019年11月, ［査読有り］
Evaluation Growing and Collapsing Behaviors of Cavitation Bubbles under Flowing Condition , Advanced Experimental Mechanics
S. Kawamura; T. Naoe; N. Tanaka; M. Futakawa, 責任著者
Advanced Experimental Mechanics, 2019年08月, ［査読有り］
Pulsed Pressure Induced Cavitation Erosion in Mercury Narrow Channel under Flowing Conditions
Takashi NAOE; Hiroyuki KOGAWA; Nobuatsu TANAKA; Masatoshi FUTAKAWA
Advanced Experimental Mechanics, 2019年08月, ［査読有り］
Aiming at disposal of radio-active waste, laser cutting development to suppress the sputter particles
Takashi Naoe; Makoto Teshigawara; Masatoshi Futakawa; Haruki Mizutani; Toshiharu Muramatsu; Tomonori Yamada; Yuji Ushitsuka; Nobuatsu Tanaka; Kazuhiko Yamasaki
The 8th International Congress on Laser Advanced Materials Processing, 2019年05月, ［査読有り］
Visualization of Cavitation Growing and Collapsing Behaviors in Narrow Channel,
S. Kawamura; T. Naoe; T. Ikeda; N. Tanaka; M. Futakawa, 責任著者
13th International Symposium on Advanced Science and Technology in Experimental Mechanics, 2018年10月, ［査読有り］
Optimization of the Swirl Gas Microbubble Generator for a Liquid Mercury Target Vessel
Tsubasa IKEDA; Hiroyuki KOGAWA; Takashi NAOE; Shunsuke KAWAMURA; Nobuatsu TANAKA; Masatoshi FUTAKAWA, 責任著者
13th International Symposium on Advanced Science and Technology in Experimental Mechanics, 2018年10月, ［査読有り］
Three Dimensional Numerical Analysis of Two Phase Flow Separation Using Swirling Fluidics
Mizunar Rahman; Nobuatsu Tanaka; Seiichi Yokobori, 責任著者
Energy and Power Engineering, 2013年, ［査読有り］
高出力パルス核破砕中性子源におけるキャビテーション
混相流, 2011年, ［査読有り］
メッシュ法・粒子法のハイブリッド・アプローチによる砕波・液滴飛散の数値解析田中伸厚、西村健、渡辺史紀、森治嗣, 筆頭著者, This study is concerned with extension of numerical code called CRIMSON (Civa RefIned Multiphase SimulatiON), which has been developed to evaluate multi-phase flow behaviors based on the recent CFD (computational fluid dynamics) techniques. The CRIMSON employs a finite-volume method combined with the high order interpolation scheme, CIVA (cubic-interpolation with area/volume coordinates). The CRIMSON solves gas-liquid two phases by a unified scheme of CUP (combined unified procedure). The conventional CIVA method has a problem of loosing interface sharpness in long-term calculation. In this study, the problem was solved by introducing the idea of the phase field method. For numerical analyzing splashing fluid, we also introduced the SPH particle method to the CRIMSON., 一般社団法人 日本機械学会
日本機械学会論文集、Ｂ編, 2010年
Bubble flow simulations in target vesselKatsuhiro Haga; Hiroyuki Kogawa; Takashi Wakui; Takashi Naoe; Masatoshi Futakawa; Shogo Yamazaki; Nobuatsu Tanaka
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2009年02月,
［査読有り］ Numerical analysis of swirling flow inducing gas entrainment by dynamic SGS model based on LISEA
N.Tanaka; T.Taguchi; Y.Motoyama; H.Ohshima, 筆頭著者
Comput. Fluid Dynamics J., 2008年, ［査読有り］
NUMERICAL ANALYSIS OF CAVITATION EROSION USING GAS-LIQUID-SOLID UNIFIED METHOD WITH CIVA
R.Maseguchi and N.Tanaka, 責任著者
Proc. 3rd Asian-Pasific Congress on Computational Mechanics, 2007年12月
THEE-DIMENSIONAL SIMULATION OF RED BLOOD CELLS USING SPH AND ITS VISUALIZATION
N.Nakamura and N.Tanaka, 責任著者
Proc. 3rd Asian-Pasific Congress on Computational Mechanics, 2007年12月
Numerical analysis of thermal-hydraulic behaviors in SI system
Y. Omayu; N.Tanaka; and M.Mori, 責任著者
Proc. 15th Int. Conf. on Nuclear Engineering (ICONE-15), Nagoya, Japan., 2007年04月, ［査読有り］
Numerical Simulation of Mercury Cavitation in magnetic impact testing machine
N. Tanaka and M.Futakawa, 筆頭著者
Proc. 6th Int. Symp. on Cavitation, Wageningen, Netherlands., 2006年09月
Three-dimensional simulations of microscopic blood flow using SPH method
N. Tanaka; Y. Hayakawa and T. Masuzawa, 筆頭著者
5th World Congress of Biomechanics, Munich, Germany., 2006年07月
CIVA法を用いたキャビテーションの数値解析
混相流特集号,混相流研究の進展I, 2006年04月, ［査読有り］
Conservative CIVA based on finite volume method
筆頭著者
Comput. Fluid Dynamics J., 2006年01月
Numerical Simulation of Mercury Cavitation in MW Scale Spallation Neutron Sources
N.Tanaka; M.Futakawa and M.Suzuki, 筆頭著者
Proc. Int. Conf. on Accelerator Applications, Venice, Italy., 2005年08月
Volume-preserving semi-lagrangian algorithms For multi-dimensional pollutant advection
N. Tanaka; S. Tsunoyama, 筆頭著者
Comput. Fluid Dynamics J., 2005年04月, ［査読有り］
Error estimation of numerical solutions of linear convection-diffusion problems
N.Tanaka; Y.Motoyama, 筆頭著者
Int. J. Comput. Fluid Dynamics, 2005年01月, ［査読有り］
Sensitivity Analysis of Numerical Results of One- and Two-Dimensional Advection-Diffusion Problems
Y.Motoyama; N.Tanaka, ラスト(シニア)オーサー
J. Nucl. Sci. Technol.,, 2005年01月, ［査読有り］
離散要素法を用いた微小循環内の血流シミュレーション
岩田賢、田中伸厚、増澤徹, 責任著者
ライフサポート, 2005年, ［査読有り］
随伴感度解析法に基づく非線型移流拡散方程式の数値解の誤差評価田中 伸厚; 本山 和道, 責任著者, In this study, we present a new numerical method to analyze quantitatively the error of numerical solution by using the adjoint sensitivity analysis method and the modified equation approaches. If a reference case of typical parameters is once calculated with the method, no additional calculation is required to estimate the results of the other numerical parameters such as those of more detailed resolution. Furthermore, we can estimate the strict solution from the sensitivity analysis results and can quantitatively evaluate the error of numerical solutions based on only the numerical procedures., 一般社団法人日本機械学会
日本機械学会論文集, 2005年,
［査読有り］ Symplectic semi-Lagrangian schemes for unsteady incompressible viscous flow simulations
N.Tanaka; T.Kitayama; T. Shimizu, 筆頭著者
Comput. Fluid Dynamics J., 2004年10月
Application of symplectic integrators to discrete vortex methods for Karman vortex problem
Nobuatsu Tanaka; Toshiteru Yamasaki, 筆頭著者
Comput. Fluid Dynamics J., 2004年
Error estimation of finite-difference solution of advection equation for environmental fluid problems
Nobuatsu Tanaka, 筆頭著者
Comput. Fluid Dynamics J., 2003年
Adaptive grid control methods for CFD: I. Application to natural convection in a square cavity
筆頭著者
Comput. Fluid Dynamics J., 2003年
Adaptive grid control methods for CFD: II. Application to multi-grid method and boundary-fitted coordinate system
Nobuatsu Tanaka, 筆頭著者
Comput. Fluid Dynamics J., 2003年
Application of symplectic integrators to discrete vortex methods
Nobuatsu Tanaka; Toshiteru Yamasaki, 筆頭著者
Comput. Fluid Dynamics J., 2002年
Hamiltonian Particle Dynamics, CIVA-Particle Method and Symplectic Upwind Scheme
Nobuatsu Tanaka, 筆頭著者
Computational Fluid Dynamics Journal, 2001年01月, ［査読有り］
Parallel processing of Haar-Wavelet-preconditioned conjugate gradient methods
Nobuatsu Tanaka, 筆頭著者
Transaction of Japan Society Computational Engineering and Science, 2001年, ［査読有り］
Hamiltonain Particle Dynamics 法の開発（基礎的概念の提案）
筆頭著者
日本計算工学会論文集, 2001年, ［査読有り］
Hamiltonain Particle Dynamics 法の開発（シンプレクティック時間積分法の応用）
筆頭著者
日本計算工学会論文集, 2001年, ［査読有り］
Wavelet-preconditioned conjugate gradient Poisson solver and its use in parallel processing
Nobuatsu Tanaka, 筆頭著者
Computational Mechanics, 1999年
CIVA-粒子法の非圧縮性流体解析への応用
田中伸厚, 筆頭著者
日本機械学会論文集 (B), 1999年, ［査読有り］
数値流体力学のための高精度メッシュフリー手法の開発
田中伸厚, 筆頭著者
日本機械学会論文集(B), 1998年04月
Development of new mesh-free algorithm with a high accuracy for computational fluid dynamics
筆頭著者
Trans. JSME, 1998年
不完全離散ウェーブレット変換のポアソン方程式解法への応用と並列処理田中 伸厚, 筆頭著者, This paper describes a powerful and simple new wavelet-based preconditioning method for the CG solvers of Poisson equation. The equation can be solved with an iterative matrix solver, however, in the absence of our method, the computing time will increase exponentially with respect to an increase in grid points. Use of our technique leads to a matrix with a bounded condition number so that computing time is reduced significantly. Results from our numerical experiments confirm the power and accuracy of our wavelet-based preconditioning method. Unlike many preconditioning methods which are not suitable for vector and parallel processing, our algorithm can take advantage of the extreme processing capabilities and enhance computing performance. For example, a speed up of over 100 fold can be achieved when solving Poisson equations on a Cray T3D using 128 processors in parallel., 一般社団法人 日本応用数理学会
日本応用数理学会論文誌, 1997年
小規模ブロック化行列の多項式を用いた共役勾配法の前処理手法の改良
田中伸厚; 寺坂晴夫, 筆頭著者
情報処理学論文集, 1995年08月, ［査読有り］
小規模ブロック化行列の多項式を用いた共役勾配法の前処理手法の開発
田中伸厚; 寺坂春夫, 筆頭著者
情報処理学論文集, 1994年04月, ［査読有り］
