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Hi PF!

Attached is an figure from Bird Stuart and Lightfoot. I'm wondering if anyone can comment about the difference in spacing of these streamlines assuming each streamfunction is evenly spaced (or does this requirement make this picture invalid)?

My interpretation assuming each streamfunction sketched is evenly spaced, meaning ##\psi = 1,2,3...##: the difference between any two streamfunctions is volumetric flow rate. Then streamlines closer together would imply faster flow, so that the flow is the fastest in the far field before and after the solid body in figures a, b, that flow is fastest before the solid body in figures c and d, and that flow is fastest close to the solid body in figure e. Assuming the streamfunctions are evenly spaced, is this interpretation true?

Attached is an figure from Bird Stuart and Lightfoot. I'm wondering if anyone can comment about the difference in spacing of these streamlines assuming each streamfunction is evenly spaced (or does this requirement make this picture invalid)?

My interpretation assuming each streamfunction sketched is evenly spaced, meaning ##\psi = 1,2,3...##: the difference between any two streamfunctions is volumetric flow rate. Then streamlines closer together would imply faster flow, so that the flow is the fastest in the far field before and after the solid body in figures a, b, that flow is fastest before the solid body in figures c and d, and that flow is fastest close to the solid body in figure e. Assuming the streamfunctions are evenly spaced, is this interpretation true?