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Kim, M.*; Lee, C.*; Sugita, Yutaka; Kim, J.-S.*; Jeon, M.-K.*
Geomechanics for Energy and the Environment, 41, p.100628_1 - 100628_9, 2025/03
Times Cited Count：1 Percentile：67.60(Energy & Fuels)This study investigates the impact of primary variables selection on the modeling of non-isothermal two-phase flow, by using the numerical work on the full-scale Engineered Barrier System (EBS) experiment conducted at Horonobe URL as part of the DECOVALEX-2023 project. A validated numerical model is employed to simulate the coupled thermo-hydrological behavior of heterogeneous porous media within the EBS. Two different primary variable schemes are compared in discretizing the governing equations, revealing significant difference in results.
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HRLSawada, Atsushi; Sakamoto, Kazuhiko*; Watahiki, Takanori*; Imai, Hisashi*
SKB P-17-06, 154 Pages, 2023/08
Villard, L.*; Angelino, P.*; Bottino, A.*; Allfrey, S. J.*; Hatzky, R.*; Idomura, Yasuhiro; Sauter, O.*; Tran, T. M.*
Plasma Physics and Controlled Fusion, 46(12B), p.B51 - B62, 2004/12
Times Cited Count：30 Percentile：66.50(Physics, Fluids & Plasmas)This paper reviews the present status of recent first principles based plasma turbulence simulations, and gives quantitative discussions on influences of the v// nonlinearlity and the geometry effects in the gyrokinetic Poisson equaiton, which are ignored in the conventional approximations, on simulations results. Careful treatments of these effects enable turbulence simulations satisfying the conservation of the energy and the particle number. The new simulation disclosed new phenomena, and it is found that (1) turbulence spreading is induced by avalanche like phnemena consisting of bursty heat transport and local flattening of pressure profiles, and (2) nonlinearly driven E
B flows become global shear flows with scale lengths of about 30 ion gyro radii.
Guo, Z.; Hirayama, Toshio; Matsuzawa, Teruo*; Watanabe, Masahiro*
Keisan Kogaku Koenkai Rombunshu, 7(1), p.173 - 176, 2002/05
no abstracts in English
Guo, Z.; Hirayama, Toshio; Matsuzawa, Teruo*
Application of High-Performance Computing in Engineering VII, p.125 - 134, 2002/00
The objective of the presented study is to develop a LC (Loose Coupling) simulation system implementing two commercial numerical simulation software packages linked by a library called MpCCI (Mesh-based paralle Code Coupling Interface). This library is an essential and a robust tool for carrying out interpolations of the physical variables (values) between different numerical models. We have programmed the MpCCI library into two commercial codes, Mecano and Star-CD, and implemented the developed LC simulation system on a distributed parallel computer by a MPMD (Multi Program Multi Data) parallel programming style. Numerical simulation results of an aneurysm diseased artery acquired by dynamic CSD (Computational Structure Dynamics) coupled transient CFD (Computational Fluid Dynamics) undergoing pulsation blood flow with the LC simulation system is presented which illustrate the mechanical behaviors of the arterial wall.
Muhammad, I.; Yamashita, Susumu
no journal, ,
JAEA has developed design tools to assess the thermal-hydraulic behavior and structural stresses on the beam windows (BW) of an accelerator-driven system (ADS). These tools require experimental validation to ensure the accuracy for design optimization. However, due to the difficulty of performing experiments, validation by numerical simulation has become important in recent years. Therefore, a coupling platform was developed between the detailed thermal-hydraulic analysis code JUPITER and the structure analysis code FrontISTR. In previous work, the one-way coupling scheme was implemented. However, the one-way method is still insufficient in calculating the fluid-structure interaction (FSI) phenomena in ADS beam window. This presentation provides an overview of the JUPITER-FrontISTR two-way weak coupling platform for FSI analysis.
