Timeline for Do we have an explanation for the windbag experiment?
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 1 at 23:12 | comment | added | rationalDiscourse | @RC_23 I'm interested in the idea that air "drags surrounding air". Do you have any literature on that (not Wiki!) | |
| Sep 30 at 9:05 | comment | added | enbin | @RC_23 The analogy of blowing air with the mouth is not strict. For example, the surface of the lips is curved, and so on. You can use a garden hose analogy. Water flows out from a garden hose, and after leaving the outlet of the garden hose, the pressure of the water is generally atmospheric pressure. | |
| Sep 30 at 5:24 | comment | added | RC_23 | But also, the person in the video invokes Bernoulli's principle claiming that the central jet of air from his mouth has a lower pressure due to its motion, which causes surrounding air to rush inward, filling the bag. This would happen even with inviscid flow. | |
| Sep 30 at 5:20 | comment | added | RC_23 | I think this answer could more clearly state the point for the OP: the moving air drags surrounding air with it, pulling it into the bag. When blown directly into the object, it does not pass by adjacent air and does not have a chance to do this | |
| Sep 30 at 0:05 | history | answered | enbin | CC BY-SA 4.0 |