Bernoulli, beer jugs & draining tanks
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- Опубликовано: 3 июн 2024
- How long does it take to drain a tank? Bernoulli's equation is our starting point in answering this question, but I demonstrate why the theory isn't great at predicting what happens in reality. We look at why this is the case, and how process engineers deal with it when applying in practice.
Link to the predictions & experimental data: drive.google.com/file/d/1SsEN...
00:00 Intro
01:02 The maths
05:41 What if there is a pipe at the outlet?
07:13 Experimental setup
08:37 Results of draining a beer jug
10:01 Bernoulli's assumptions & discharge coefficients
12:52 Ugly equations that work
Process with Pat is the place to come for perspective and to ask stupid questions. I want you to leave more knowledgeable, confident, motivated, and most importantly, curious. I also want to invigorate a field that seems tired and uninspiring, at least if you get your perspective from internet forums. These are not lectures. This is a place for you to leave thinking “Oh! That’s why...”
This channel is not only for chemical engineers - anyone who works with processes should be able to find something of value here.
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#ChemicalEngineering
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Intresting
Thanks Pat, love your work. I was busy typing " you missed coefficient of discharge" when I looked up at your video again and there its was :-)
Superbly done. Superbly explained.
Thanks Buddy.
This is genius. Wish that such concept be taught at university. More videos please.
This is a must see video for every aspiring engineer.
excellent work!
man you r awesome still can't believe you only have 1000 subscribers you are high tier RUclips man seep the hard work
I really appreciate it. I’ve gotten a few comments like that, but as long as some people are finding it useful and interesting then I’m achieving what I set out to do!
Interesting video, and completely refresh my mind. Sir I have one question that, if two tanks at different pressure and connected with one pipeline. And there is valve on the pipeline, as soon as we open the valve fluid will start flowing from high pressure to low pressure till it reaches the equilibrium, but how we can calculate the flow rate of the flowing fluid? As we don't know the velocity.
Hi there! Glad you found it interesting. You could only begin to start calculating that kind of thing if you had the dimensions of each tank, the initial levels, the pressure in the vapour space of the tanks, as well as the dimensions/arrangement of the line that interconnects them...
@@ProcesswithPat thank you sir.
Its a blockage issue. You didn't debur the hole and any obstruction you leave affects the calculation. With those small holes a single bur has a large effect.
Nice video. We could see the cat trying to grab attention
ruclips.net/video/sUroO7PXm5M/видео.html This video shows a more accurate actual result compared to the computed one. I wonder if the die had something to do with the error on your experiment.
I think it's because the hole in that video is on the curved side of the bottle compared to the flat bottom of Pat's video. The hole in the side of the bottle effectively has two sides with rounded edges making the discharge coefficient closer to ~1.0 whereas Pat calculated ~0.61 for the hole on the flat bottom. So that guy's results are closer to his formula even though he left out the discharge coefficient.