AA-PINN: ATTENTION AUGMENTED PHYSICS INFORMED NEURAL NETWORKS
Physics Informed Neural Networks has been quite successful in modelling the complex nature of fluid flow. Computational Fluid Dynamics using parallel processing algorithms on GPUs have considerably reduced the time to solve the Navier Stokes Equations. CFD based approaches uses approximates to make the modelling easy but it comes at the cost of decrease in accuracy. In this paper, we propose an attention based network architecture named AA-PINN to model PDEs behind fluid flow. We use a combination of channel and spatial attention module. We propose a novel loss function which is more robust in handling the initial as well as boundary conditions imposed. Using evaluation metrics like RMSE, divergence and thermal kinetic energy, our network outperforms previous PINNs for modelling Navier Stokes and Burgers Equation.
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