2023 Fiscal Year Research-status Report
Peridynamics-based thermal-hydro-mechanical solver for rock fractures
| Project/Area Number |
23K13403
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| Research Institution | Kyoto University |
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Principal Investigator |
ZHU FAN 京都大学, 工学研究科, 准教授 (80968553)
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| Project Period (FY) |
2023-04-01 – 2026-03-31
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| Keywords | fracture / peridynamics / fluid-solid-interaction / particle method |
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| Outline of Annual Research Achievements |
The following work has been completed as scheduled.
1). A peridynamics-based fluid solver is developed based on an updated-Lagrangian computing scheme. To improve numerical stability, stabilization schemes are implemented. The scheme is validated with water dam collapsing experiments.
2). A coupled hydro-mechanical peridynamic method is developed for simulation of fluid-driven fracturing in solids. Classical peridynamics theory is used for simulating solid with fracturing, update-Lagrangian peridynamics is adopted for fluid modeling, with a fictious-point solid-fluid interaction modeling scheme. The new method is proven effective in modeling hydraulic fracturing in impermeable solid by comparing with theoretical solutions.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
The planned work up to the first quarter of 2024 has been finished as scheduled, including development of a peridynamics-based fluid solver and a fluid-solid interaction modeling scheme. The planned work in 2024-2025 is being progressed smoothly, including development of poroelastic peridynamics model and hydraulic fracturing in porous media. Coupled hydro-thermal-mechanical solver is under development.
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| Strategy for Future Research Activity |
Focus will be placed in the following research directions:
1. A poroelastic peridynamic computation library will be developed, based on the poroelastic theory and flow governing equation with implementation of non-local integral-differentiation operator. New formulation will be derived and implemented with computer codes. The computation scheme will be validated with a series of experiments and theoretical solutions such as flow and hydraulic fracturing in porous media.
2. A fully coupled thermal-mechanical peridynamic formulation will be derived and implemented with consideration of temperature-dependence of deformation as well as deformation-dependence of heat conduction. Finally a coupled hydro-thermal-mechanical peridynamic computational scheme will be formed.
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| Causes of Carryover |
The fund for the next year will cover the expense of hiring a proper researcher for this project and domestic travel expense for disseminating research outcome in conferences.
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