Privious Issue

Volume 45 Number 4 (2014.12)

Special Feature

CAE and Simulation

Part I. Special Feature


Research Reports

  • 2. Computational Prediction of Macroscopic Mechanical Behavior in Multi-constituent SteelsPDF(3,905kB)

    pages 1-10
    Noritoshi Iwata, Ikumu Watanabe, Daigo Setoyama and Takamichi Iwata


    Our recent research on computational predictions of macroscopic mechanical behaviors in multi-constituent steels is reviewed, where a computational approach based on the finite element method is employed to model the heterogeneity at a micro scale and to relate the deformation state of the microstructure to the macroscopic mechanical behavior. Advanced constitutive models are developed to characterize the anisotropy of the plastic mechanical behaviors. The morphology effect of the ferrite–pearlite duplex microstructure on the macroscopic property is investigated by comparing the simulations and experiments.

  • 3. An Advanced Subgrid-scale Model for Large Eddy Simulation of Turbulent Heat and Mass TransferPDF(1,989kB)

    pages 11-20
    Masahide Inagaki

    A new subgrid-scale (SGS) model for Large Eddy Simulation (LES) of thermal/passive scalar field is proposed. The performance of the proposed model is tested in plane channel flows at various Prandtl numbers of up to 95 and in the thermal entrance problem in a pipe flow. The results demonstrate the superiority of the present model as compared to conventional SGS models, which is remarkable when using a coarse grid at a high Prandtl/Schmidt number.

  • 4. Zero-dimensional Diesel Combustion Model and Its Application to the Transient Performance of a Multi-cylinder Engine PDF(1,200kB)

    pages 21-31
    Matsuei Ueda, Kazuhisa Inagaki, Yusuke Takasu and Toshihiro Tani

    The purpose of the present study is to investigate a diesel combustion model and a total engine system model by combining the combustion model and a control model. The developed model was capable of predicting the performance over a wide operation area for a transient condition.

  • 5. Phase-field Models for Microstructural Characterization of Platinum-based Alloy NanoparticlesPDF(911kB)

    pages 33-42
    Shunsuke Yamakawa, Ryoji Asahi and Toshiyuki Koyama


    The phase-field method was employed to investigate surface segregation in transition metal-platinum binary alloy nanoparticles used as a cathode electrocatalyst in a polymer-electrolyte fuel cell (PEFC). The results reveal that the compositional variation within a particle depends on the balance between the atomic interactions within particles and the surface energy.


  • 6. Exact Solution and Simulation Method for Energy Dissipation via Lattice Vibration at a Friction InterfacePDF(668kB)

    pages 43-50
    Seiji Kajita, Hitoshi Washizu and Toshihide Ohmori

    We developed a method by which to connect an infinitely large lattice to a cell of a molecular dynamics (MD) calculation. The proposed method dissipates lattice vibrational energy generated in the MD simulation properly and would be useful for accurate atomic simulation of kinetic friction, as well as other non-equilibrium phenomena, such as catalysis and fracture dynamics.

  • 7. Topology Optimization Utilizing Automated Solutions of Partial Differential EquationsPDF(2,061kB)

    pages 51-58
    Atsushi Kawamoto, Tadayoshi Matsumori, Tsuguo Kondoh and Tsuyoshi Nomura


    The present paper considers topology optimization from the agile implementation point of view utilizing automated solutions of partial differential equations (PDE). A PDE-based filtering method and a PDE-based topology optimization method are presented. The effectiveness of the proposed methods is demonstrated through numerical examples.

Part II.

Research Reports

Brief Reports