I am an MD, I am studying the fluid flow of the tears through the tears duct system of the eye. The newer view suggests that the first part of the system is a funnel or a cone. I cant seem to understand (without equations), what are the main advantages of fluid flow through a funnel?
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$\begingroup$ I do not think this is a question for physics. The advantages come from the use of a funnel for example: large area generated fluid gathered into a small output; but this depends on a biology model, i.e. how the tears are produced . $\endgroup$– anna vCommented Jun 7, 2020 at 5:22
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$\begingroup$ Thank you for the answer $\endgroup$– user266775Commented Jun 7, 2020 at 15:23
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The primary characteristic of flow through a funnel is that the ratio of the velocities of flow in one end and out the other is scaled by the ratio of the cross-sectional areas of the two ends. Slow flow in the big end is transformed into fast flow at the small end. A funnel is also called a bernoulli transformer for this reason.
answered Jun 7, 2020 at 6:02