Question

Why is stream function important in fluid mechanics?

Answer 1

The stream function can be used to plot streamlines, which represent the trajectories of particles in a steady flow. ... Since streamlines are tangent to theflow velocity vector of the flow, the value of the stream functionmust be constant along a streamline.

Answer 2

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The difference between the stream function values at any two points gives the volumetric flow rate (or volumetric flux) through a line connecting the two points. Taken together with the velocity potential, the stream function may be used to derive a complex potential.

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