Run the file, read the exposition and then answer these questions.
1. For an inviscid flow, what physical observation is made that leads to the governing equation for the flow field in terms of a scalar function?
2. Why is there a substantial simplification of the original problem in terms of the N-S equation with η =0., Re--> ∞?
3. Flow separation occurs readily in the flow past a sphere problem if Re is sufficiently high. Explain why it does not occur for an inviscid flow.