Timeline for Bernoulli's principle: Why an increase in the section area in a hose makes the pressure increase?
Current License: CC BY-SA 3.0
19 events
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Feb 9, 2017 at 15:31 | comment | added | Borun Chowdhury | What you want to do is understand how the walls force the molecules on squeezing and how the effect gets transmitted to the bulk and spreads out (or rather in) to reach equilibria. Good luck with that! But it is beyond Bernoulli's principle which is a coarse grained result. | |
Feb 9, 2017 at 15:29 | comment | added | Borun Chowdhury | The transition region can be broken into small segments and each of them treated as "non-transitioning regions" as long as the segments are larger than the thermalization scale. So now you will say you want to go to shorter length scales and then we are back to the non-thermodynamic regime where Bernoulli's principle is simply not valid. Basically you are trying to use an equation beyond its range of validity. | |
Feb 9, 2017 at 13:05 | comment | added | user142405 | I meant the region where the section area changes. | |
Feb 9, 2017 at 12:33 | comment | added | Pirx | No. What you are talking is a principle of hydrostatics, which has nothing to do with your question, I think; even though by now, with your last comments, I admit that I have no idea what it really is you are after. What "transition region"? Is this about unsteady flow now? | |
Feb 9, 2017 at 11:35 | history | protected | Qmechanic♦ | ||
Feb 9, 2017 at 11:14 | answer | added | Borun Chowdhury | timeline score: 1 | |
Feb 8, 2017 at 19:26 | comment | added | user142405 | However, Pascal's equation of "force multiplication" may answer the question. What do you think? | |
Feb 8, 2017 at 10:30 | comment | added | user142405 | Hello! I think I've been asking the wrong question. I wanted to know what happens at the "transition region" and Bernoulli's law describes what happens when the fluid is already flowing. Also the principle is applied in continuum mechanics where things are not explained at the molecular level. | |
Feb 7, 2017 at 23:13 | comment | added | Bill N | Corrected the title | |
Feb 7, 2017 at 23:13 | history | edited | Bill N | CC BY-SA 3.0 |
Correct the misconception in the title
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Feb 7, 2017 at 21:37 | comment | added | Pirx | I fixed the OP's mistake (probably just a typo) to eliminate some of the confusion. | |
Feb 7, 2017 at 21:36 | history | edited | Pirx | CC BY-SA 3.0 |
fixed error in first sentence: area increase leads to pressure increase
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Feb 7, 2017 at 18:33 | history | edited | user142405 | CC BY-SA 3.0 |
edited body
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Feb 7, 2017 at 18:09 | comment | added | D. Ennis | So far none of the answers below have dealt with your original misconception. According to Bernoulli's principle, the pressure increases in the section of hose with the larger cross section. | |
Feb 7, 2017 at 17:21 | answer | added | Erico M Junior | timeline score: -1 | |
Feb 7, 2017 at 16:46 | answer | added | Gert | timeline score: 6 | |
Feb 7, 2017 at 16:29 | comment | added | Žarko Tomičić | At he molecular level number of particles coliding with the unit area of the surface decreases as the area increases. | |
Feb 7, 2017 at 16:06 | history | edited | user142405 | CC BY-SA 3.0 |
deleted 1 character in body
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Feb 7, 2017 at 15:34 | history | asked | user142405 | CC BY-SA 3.0 |