About this Abstract |
Meeting |
TMS Specialty Congress 2024
|
Symposium
|
2nd World Congress on Artificial Intelligence in Materials & Manufacturing (AIM 2024)
|
Presentation Title |
Rethinking Materials Simulations: Blending Direct Numerical Simulations With Neural Operators |
Author(s) |
Vivek Oommen, Khemraj Shukla, Saaketh Desai, Remi Dingreville, George Em Karniadakis |
On-Site Speaker (Planned) |
Vivek Oommen |
Abstract Scope |
Direct numerical simulations (DNS) are accurate but computationally expensive for predicting materials evolution across timescales, due to the nature of spatiotemporal interactions across scales, and the need to reach long-time integration. We develop a new method that blends numerical solvers with neural operators to accelerate such simulations. Specifically, we integrate a community numerical solver (MEMPHIS) with a U-Net enhanced by temporal conditioning mechanism that enables accurate extrapolation and efficient time-to-solution predictions of the dynamics. We demonstrate the effectiveness of this framework on simulations of microstructure evolution during physical vapor deposition modeled via the phase-field method. These simulations exhibit high spatial gradients due to the co-evolution of different material phases with simultaneous slow and fast materials dynamics. We establish accurate extrapolation of the coupled solver with 16.5x speed-up compared to DNS. This methodology is generalizable to a broad range of evolutionary models, from solid mechanics, to fluid dynamics, climate, and more. |
Proceedings Inclusion? |
Definite: Other |