Prof. Kevin Carlberg from the University of Washington, Seattle, USA, will give a 1 hour talk on ‘Nonlinear model reduction: using machine learning to enable rapid simulation of extreme-scale physics models’ as part of our this years online Winter School.

Abstract:
Physics-based modeling and simulation has become indispensable across many applications in science and engineering, ranging from autonomous-vehicle control to designing new materials. However, achieving high predictive fidelity necessitates modeling fine spatiotemporal resolution, which can lead to extreme-scale computational models whose simulations consume months on thousands of computing cores. This constitutes a formidable computational barrier: the cost of truly high-fidelity simulations renders them impractical for important time-critical applications (e.g., rapid design, control, real-time simulation) in engineering and science. In this talk, I will present several advances in the field of nonlinear model reduction that leverage machine-learning techniques ranging from convolutional autoencoders to LSTM networks to overcome this barrier. In particular, these methods produce low-dimensional counterparts to high-fidelity models called reduced-order models (ROMs) that exhibit 1) accuracy, 2) low cost, 3) physical-property preservation, 4) guaranteed generalization performance, and 5) error quantification.

Further information on how to join the talk will be send by email.