Will a funnel in a river pump water?
August 14, 2009 2:57 PM Subscribe
PhysicsFilter: The Setup: a 3 meter hose with a 1 millimeter interior diameter is attached to the small end of a funnel with a 1 meter maximum diameter and a 1 millimeter minimum diameter. This assembly is submerged in a "quick-flowing river" with the large end of the funnel facing into the current (so, "on its side"). The free end of the hose is raised 10 centimeters above the top of the funnel and this happens to be above the water level as well.
The Question: Theoretically, will water come out of the raised end of the hose? If so, what is the equation that will let me input the rate of the "quick-flowing river" get the rate of discharge from the free end of the hose?
posted by cmchap to science & nature (13 answers total)
I ran this past my engineer father, and he past some of his engineer friends. We have differing opinions.One of the engineers is pretty sure that Bernoulli's Principle
will come into play.
Are there examples of this kind of "pump" in the real world? I'd imagine they're VERY inefficient.