Accepted into the Fellowship Program
I have been selected for the FY2026 Kyoto Institute of Technology Fellowship Program. I have finally secured funding to cover my living expenses.
I have been selected for the FY2026 Kyoto Institute of Technology Fellowship Program. I have finally secured funding to cover my living expenses.
Visited Prof. Wu at Technical University of Leoben, Austria.
Completed the “Kyoto Arashiyama Heat Relay Marathon 42.195” with lab members.
Visited the synchrotron radiation facility SPring-8.
Received the award at ICASP7 for the graphical abstract.
Near the melting point where solid and liquid coexist, solid fragmentation can occur under very small external forces. This deformation-triggered fragmentation emerges from multi-physics interactions—solidification/melting, grain-boundary formation, liquid flow, and solid deformation—yet its mechanism remains unclear due to the complexity. Our group develops a high-fidelity numerical framework to reproduce fragmentation and to reveal hidden mechanisms via simulations. Specifically, we couple the phase-field method (solidification/melting & grain boundaries), the lattice Boltzmann method (liquid flow), and the material point method (solid deformation) into a unified multi-physics model.
A key challenge is representing solid morphology changes caused by both solidification and deformation. We use the phase-field method for solidification and the material point method for solid deformation and motion. MPM is a particle-based method capable of flexibly handling large deformation and failure, enabling consistent coupling between solidification and deformation.
Fragmentation during solidification can be viewed as fracture with phase change between solid and liquid. For conventional fracture problems without phase change (solid–gas), we apply a PF-FFT crack model that combines the phase-field method for crack representation and FFT-based mechanics for efficient large-scale simulations.
Gensei Kobayashi
Kyoto Institute of Technology (M2)
Hometown: Himi City, Toyama
Keywords
Computational mechanics, solidification, deformation, fragmentation
Phase-field, MPM, FEM, FFT, LBM
Email: kobayashi.kit.cmd@gmail.com
