What did we do before CFD?

This 90 minute recording of a discussion on CFD-challenges covers a lot of ground and contains several items of interest, not least the prediction that the need for increased resolution and fidelity is quickly going to lead to billion-cell grids. Our highlight for this issue, though, relates to the question cited by a panelist: “we went to the moon without high end computers, why do we need them now?”. Why indeed! Listen to this answer to get one expert’s view.