Physics as data

Which physical quantities a surrogate predicts, how geometry and fields become numbers, and how the training simulations are chosen.

• Physical fields: Decide which quantities the model must reproduce before choosing the model.
• Surface and volume fields: Predict the field everywhere in the domain, not just on the walls: velocity, pressure, temperature in the volume.
• Representations: Voxel grids, graphs or point clouds: how geometry and fields become numbers.
• Sampling the design space: Spread a limited simulation budget evenly over the designs you care about.