I am really grateful for this video. I am taking a course that just said, "make a venturi". So I googled it, wiki'ed it, and was still lost. A video is worth a trillion words. Well demonstrated. Thank you.
Have been looking around for a good explanation of the Venturi effect since I've heard sports cars use it...this has been the most intuitive explanation I've found so far. Thanks! :)
Thank you good sir for demonstrating the venturi effect and giving a thorough explanation. It make a lot of sense now with what I am learning in the lab :)
This is a fantastic video. I learn best with examples, and when learning a new concept, displaying several examples really paints the picture. Thank you.
It's specifically much more the venturi effect than the bernuli principle. The bernulli effect is about energy conservation, whereas this is about mixing of air streams. That's why a vernturi pump is a venturi pump, not a bernulli pump.
zakkyummms No need to be sarcastic, but then again you didn't say much either, I was making fun, and if you don't like it don't click that reply button.
You sir, are an artist and genius. I thoroughly enjoy your channel. Every video is a fascinating gem. Thank you for sharing your many varied creations.
A Pelican fountain pen. Bought it in Germany Nice no nonsense fountain pens, work way better than the parker fountain pens (which are mostly for status)
Excellent work; I'm going to use a clip of the first example with the paper tube for part of a presentation as an example of the venturi effect and how it relates to my research. Thank you!
The principle is also used in old chemistry labs to provide vacuum for rotary evaporators. An adapter is connected to a faucet to create the vacuum. Wastes a good deal of water in the process.
Pelikan, with the regular blue Pelikan ink. Pelikan makes the best fountain pens. Plain, simple and relatively inexpensive, but they write way better than expensive Parker pens.
hi, what a great video !! very interesting effect that a few people in the diy gas turbine forums are looking at, to use as a argumentation for there gas turbine engines. either running dry or using a afterburner.i was talking to someone in regards for using this to help the thrust on there jet powered gokarts .i really liked the way you explained it, and made it very clear. regards jon
I get the venturi effect now. I've heard of it in a number of contexts all my life but, really did not know what it was exactly. What I see happening is that you're creating a relative low pressure zone in the top of the straw which creates a vacuum which draws up the liquid or gas. Very cool.
You know the bucket of water with the hose pipe experiment you demonstrated, if you swapped the hose pipe with an airline like you used for the saw dust, I'm guessing that's what you're explaining? Water's way more dense than air, so the energy will dissipate and not push the water out as quick as water to water would... makes sense.
@@Johny40Se7en ⚠️ God has said in the Quran: 🔵 { O mankind, worship your Lord, who created you and those before you, that you may become righteous - ( 2:21 ) 🔴 [He] who made for you the earth a bed [spread out] and the sky a ceiling and sent down from the sky, rain and brought forth thereby fruits as provision for you. So do not attribute to Allah equals while you know [that there is nothing similar to Him]. ( 2:22 ) 🔵 And if you are in doubt about what We have sent down upon Our Servant [Muhammad], then produce a surah the like thereof and call upon your witnesses other than Allah, if you should be truthful. ( 2:23 ) 🔴 But if you do not - and you will never be able to - then fear the Fire, whose fuel is men and stones, prepared for the disbelievers.( 2:24 ) 🔵 And give good tidings to those who believe and do righteous deeds that they will have gardens [in Paradise] beneath which rivers flow. Whenever they are provided with a provision of fruit therefrom, they will say, "This is what we were provided with before." And it is given to them in likeness. And they will have therein purified spouses, and they will abide therein eternally. ( 2:25 ) ⚠️ Quran
A very good explanation, Matt. Thanks for sharing it. I'd heard of the Venturi effect and had a basic idea of it but your demonstrations really make it clear. Be careful with that flame thrower, though. ;-) Larry
Your a really smart and inspiring guy when I graduate from high school in gonna go for a degree in things like this thank you for all your knowledge and your videos are inspireing keep up the great work I hope to be like you someday p.s. your dad must have been very proud of the great work you do and all your accomplishments....take care and make a wooden fidget spinner plzzz i started a business making these things....
The explanation of what happens is accurate. This name of the effect is, however, turbulent mixing, not the Venturi effect. The Venturi effect is the decrease in pressure at a restriction according to Bernoulli's law. This can also be used to create a low pressure, but it does not require turbulence nor viscosity. Thanks for the demonstration.
FYI, this application of the Venturi effect is known as an injector, there is a neat Wikipedia article on such devices. They used to be used to pump water into the boilers of steam locomotives using high pressure steam from the boiler.
I think that's how carburetors work. The engine pulls in air by the vacuum created from the piston on the intake stroke, and then the flow of air causes the fuel to come up to be mixed with the air (like your spray gun example). :)
Since your spray gun hose (straw) is placed in front of the compressed air nozzle, I would argue that the drop in pressure is caused by the Bernoulli Effect - fluids in an area moving faster than the the surrounding area possess less pressure. Since the air moving across the top of the straw is moving so quickly, the pressure drops and causes suction through the straw. Granted, I was a music major and my knowledge of the Bernoulli Effect is limited to its effect on vocal folds! Also granted, I had never heard of the Venturi Effect until just now. Thanks for learning me so good!
Matt Wallace Well, since all the air around me isn't moving either, I should then experience a tremendous vacuum from all the air that is not moving, according to your explanation.
Matthias Wandel Matt Wallace The Venturi effect is a subset/example of the Bernoulli Principal. Either can be explained by particle replacement or the pressure/speed-of-flow relationship. Matthias, going off of Matt's explanation, we do experience pressure (not vacumm) from the air that is not moving ~1 atm of pressure. That applied pressure is actually quite important for biological functions! Some people can actually feel pressure differences caused by storm systems because the pressure inside their body is not equalized properly and then the pressure differential is then felt as a force on their joints, for example.
Matthias Wandel Bernoulli's equation is a relation between speed and pressure along a single streamline, that is, a path taken by particles through the fluid. It's not valid in this case because Andrew is trying to compare different streamlines, and because the flow is unsteady. (In fact, the pressure in the jet is more or less atmospheric!) The suction is (as you stated) due to the deceleration of the jet due to turbulence, which causes a rising pressure gradient. Since the air at the far end of the tube is atmospheric, the air at the jet end is must be below atmospheric pressure, hence suction. Your friendly neighbourhood engineering student
+Matt Wallace Bernoulli: Fluid pressure is inverse to velocity. Venturi: Fluid pressure in a pipe reduces in a constriction. Since we are talking in very oversimplified terms (compared to actually modeling this with CFD and being realistic about what is happening here), the process would be: #1. The ID of the pipe is expanded when it exits the nozzle into the paper towel roll - most directly relevant to the Venturi principle which relates fluid pressure to pipe ID. #2. The high velocity fluid pushes out the air inside the paper towel roll, and this high velocity compared to the static atmospheric air creates a pocket of low pressure (Bernoulli- ish), which creates a pressure differential that moves air up to fill behind it. That relationship is also the result of the conservation of mass (mass flux in needs to equal mass flux out, the high velocity air going out x the cross sectional area needs to be equal to the velocity of the air entering x the same cross section). It is probably best to phrase this system in the context of the conservation of mass because applying Bernoullis has a lot of requirements, which they would not discuss in music. For example, Bernoullis only applies to inviscid flow, but all fluid is viscous so it will have viscous forces along the inner walls of the paper towel (in the boundary layer). So Bernoullis could only apply outside the boundary layer, and in a pipe this small the boundary layer is significant. Source: Fluid mechanics is a subset of mech engr, I have BSME, MSME
+CoolRiffz Not sure if i understand (english is not my native language...), but Bernoulli principle can be related with limitations in flow, derived from pressure drop (that comes from viscous limitations) and pressure gains (inputs, pumps, for example). So you can apply in every system, taking in account the real limitations on a system.
That is also how a steam injector works for getting water pumped into a pressurized boiler (eg on a powerplant or a steam locomotive) and how a Giesl ejector creates a draft in the boiler of a steam locomotive. Airbrushes and many paint guns uses this to propel the paint.
You refreshed a memory of a modified Preval sprayer someone showed me how to make in my 1st yrs. of work. Same premise as the airhose mod., just attach tube to a screw on replaceable glass lidded container. When your broke, they work awesome. You gave me some good ideas for paint sprayers though, with your excellent drawings. I have to see stuff happen or you might as well talk Wookie? Thanks.
Man I wish I was as smart as Matthias ... I could do fun crazy things like this without either burning myself, or burning the house down... I love watching you fun videos like this
I'm about to make up a new exhaust system for the car and I wondered if the angle of the very end of the tube, plays much of a part in better moving the exhaust gasses? Ie. a 45 degree angle (or less), coming out on one side with sliced section facing the 'wind' or with it facing away from the 'wind'. Just curious about how each might affect things. 2:10
IIRC the Bernoulli equation relates the speed of a fluid to it's drop in pressure, assuming density and temperature are unchanged. The Venturi effect is when you constrict a fluid stream, causing the fluid speed to increase so the pressure drops. A jet of air is using entrainment to transfer momentum to the ambient air mass, and may be higher or lower pressure than ambient depending on the nozzle orifice. Basically, this video is showing a whole bunch of physical effects!
I know this is an old video, but could the exhaust port of a vacuum be hooked up to the intake port of a vacuum to increase the suction effect using the Venturi effect? Or is there diminishing returns?
My dude here from explaining the venturi effect to building a flamethrower
I am really grateful for this video. I am taking a course that just said, "make a venturi". So I googled it, wiki'ed it, and was still lost. A video is worth a trillion words. Well demonstrated. Thank you.
What a great video. I'm studying for the MCAT and having all these visual examples so much more effective than reading about in a text book.
lol cam here after CP FL2
@@musicrocksfu same tho
musicrocksfu woah holy shit same
@@musicrocksfu same lmaoo
Fl2 question 25?
I have never seen this topic explained like this before. The visuals you create are VERY clear and informative.
Actually, I filmed this during the drought. I hosed down the grass and the trees around before doing the flame experiments.
So basically does this Venturi effect help fan out for example fuel to help spread it out more easily if it’s either for liquid or gas fuels?
Adding fire is always good.
I never knew woodworkers could be this badass
Should have used this on the wasps
or spiders...
That's what I was about to say...
what have the spiders done?
+LemonSpy_ we are used to them. Everyone that visits has a heart attack
369 likes
Excellent visual display of the Venturi effect. Just what I needed!
The opening on the metal tube is about 1.5 mm in diameter. The numbers I quoted were to illustrate, I have no idea what the actual speed was.
Have been looking around for a good explanation of the Venturi effect since I've heard sports cars use it...this has been the most intuitive explanation I've found so far. Thanks! :)
Thank you good sir for demonstrating the venturi effect and giving a thorough explanation. It make a lot of sense now with what I am learning in the lab :)
Fantastically clear and precise explanation. Thanks Matthias
A sandblaster might have been worth mentioning.
That was the first thing that came to mind for me.
jet engin for me its how the after burner works if im not mistaken.
For me it's a carburetor
Great video! Mattias, you have a talent at clearly explaining concepts. I would love more physics videos.
This is a fantastic video.
I learn best with examples, and when learning a new concept, displaying several examples really paints the picture.
Thank you.
Your curiosity about just about everything is refreshing.
The best explanation out of all the videos I saw. I like how your video is simple and to the point.
It's specifically much more the venturi effect than the bernuli principle. The bernulli effect is about energy conservation, whereas this is about mixing of air streams. That's why a vernturi pump is a venturi pump, not a bernulli pump.
0:10
*Cocaine Snorting 101*
That comment was so very insightful. Please, I hope you continue.
zakkyummms No need to be sarcastic, but then again you didn't say much either, I was making fun, and if you don't like it don't click that reply button.
Thats joke
Watch "the most important meal of the day" by the minor prophets
r/woooosh@@zakkyummms
You sir, are an artist and genius. I thoroughly enjoy your channel. Every video is a fascinating gem. Thank you for sharing your many varied creations.
This video is great. I think I’ll check out more of his.
That hose-in-the-bucket thing blew my mind! Really cool effect.
Thanks for the fantastic quick explanations and demonstrations. I wish more more informative videos on youtube were of this quality
This is the best video I have found on the Venturi effect
The fact that you explain how ik works makes it even more fun to watch!!!!!!!!!!!!
A Pelican fountain pen. Bought it in Germany Nice no nonsense fountain pens, work way better than the parker fountain pens (which are mostly for status)
Excellent work; I'm going to use a clip of the first example with the paper tube for part of a presentation as an example of the venturi effect and how it relates to my research. Thank you!
I wanted to try it with sawdust, but it's really hard to ignite. I think if I had a bonfire to spray it into, it might work.
I love this guy! So many great tutorials! Spreading the knowledge! Thanks!
For ceramic glazing, you wouldn't want to use a real spray gun. That stuff is thick and abrasive, so the straw is an excellent idea.
Thanks for the great explanation. 10 years in the making
Kind of new to your channel but love your work...Keep doing what your doing man!
The principle is also used in old chemistry labs to provide vacuum for rotary evaporators. An adapter is connected to a faucet to create the vacuum. Wastes a good deal of water in the process.
We actually used this setup in my high school chemistry class. Never understood how it worked back then... lol
Pelikan, with the regular blue Pelikan ink. Pelikan makes the best fountain pens. Plain, simple and relatively inexpensive, but they write way better than expensive Parker pens.
hi, what a great video !! very interesting effect that a few people in the diy gas turbine forums are looking at, to use as a argumentation for there gas turbine engines. either running dry or using a afterburner.i was talking to someone in regards for using this to help the thrust on there jet powered gokarts .i really liked the way you explained it, and made it very clear. regards jon
Great video. Thanks. I saw a comment mentioning all your videos are very informative and good like this so I will be checking out more.
I love how you are mixing things up. I love the vids
Lovely demonstrations. Cheers.
That is a cool effect! 😄😊
Great job explaining in such a simplistic format!
But wrong.
Dude you are so smart I don't even know how you have made it this far... WOW. You are amazing!
thx for the phisics class, you explained it better than my hydraulics proffesor.
Crystal clear explanation 😃. It cleared all of my doubts.
Experiments so amazing senpai.
I really liked they way you explained it. Seen so many and was hard to grasp- you put it very easy. With fire -and math too :)
You are an amazing person Matthias. I love you.
I found no better explanation than this example, thanks.
I'm from Colombia!
Your neighbors must love you! Great explanation of the Venturi effect. Thank you
I get the venturi effect now. I've heard of it in a number of contexts all my life but, really did not know what it was exactly. What I see happening is that you're creating a relative low pressure zone in the top of the straw which creates a vacuum which draws up the liquid or gas. Very cool.
The Bernoulli equation is based on conservation of energy, and energy is not conserved when fluids of different speeds mix.
You know the bucket of water with the hose pipe experiment you demonstrated, if you swapped the hose pipe with an airline like you used for the saw dust, I'm guessing that's what you're explaining?
Water's way more dense than air, so the energy will dissipate and not push the water out as quick as water to water would... makes sense.
@@Johny40Se7en ⚠️ God has said in the Quran:
🔵 { O mankind, worship your Lord, who created you and those before you, that you may become righteous - ( 2:21 )
🔴 [He] who made for you the earth a bed [spread out] and the sky a ceiling and sent down from the sky, rain and brought forth thereby fruits as provision for you. So do not attribute to Allah equals while you know [that there is nothing similar to Him]. ( 2:22 )
🔵 And if you are in doubt about what We have sent down upon Our Servant [Muhammad], then produce a surah the like thereof and call upon your witnesses other than Allah, if you should be truthful. ( 2:23 )
🔴 But if you do not - and you will never be able to - then fear the Fire, whose fuel is men and stones, prepared for the disbelievers.( 2:24 )
🔵 And give good tidings to those who believe and do righteous deeds that they will have gardens [in Paradise] beneath which rivers flow. Whenever they are provided with a provision of fruit therefrom, they will say, "This is what we were provided with before." And it is given to them in likeness. And they will have therein purified spouses, and they will abide therein eternally. ( 2:25 )
⚠️ Quran
When you thought you knew how things work! I love looking at things with great detail, you often learn it's much more interesting than you thought!
But the explanation is incorrect. It is NOT the "venturi effect", but *entrainment* .
Excellent demonstrations and very clear explanations.
Thank you thank you thank you. I always enjoy your lessons they are very well explained
This is exactly what I was looking for! Now I won't need to experiment as much. TY
I love your videos mathias!!
A very good explanation, Matt. Thanks for sharing it. I'd heard of the Venturi effect and had a basic idea of it but your demonstrations really make it clear. Be careful with that flame thrower, though. ;-)
Larry
Very informative Matt - I learn what I can.
Great demonstrations in this video.
Matthias, thats pretty bad ass! Thanks for the demo.
brilliant! The examples are so clear
Excellent demonstration of the venturi effect.
Great video! You just earned a new subscriber :)
Your a really smart and inspiring guy when I graduate from high school in gonna go for a degree in things like this thank you for all your knowledge and your videos are inspireing keep up the great work I hope to be like you someday p.s. your dad must have been very proud of the great work you do and all your accomplishments....take care and make a wooden fidget spinner plzzz i started a business making these things....
Genius!!! Thanks for this valuable info!!
Thank you for quickly explaining this and very well done
Very educational. Thank you for your demo.
great demo and video
I love this guy. Everyone needs a neighbor like that
Thanks! It helped me understand how air compressor can suck. It blew my mind.
It is called entrainment. He describes the effect correctly, BUT *It has nothing to do with the venturi.* sigh. *It is ENTRAINMENT*
Sir, that last bit was also a perfect demonstration of how an 'afterburner' in a jet engine works...spray fuel into the hot gas stream, and *WOOSH*!
Another excellent video Sir
you got me in the first few seconds been tryna understand this other you tubes they dont hold a candle to ya bro
Thanks!
People know about bernoulli, and think it applies to all flow situations. It doesn't.
Damn, I was wondering about the same. Could you please explain more
How does Bernoulli's principle not apply here?
The explanation of what happens is accurate. This name of the effect is, however, turbulent mixing, not the Venturi effect. The Venturi effect is the decrease in pressure at a restriction according to Bernoulli's law. This can also be used to create a low pressure, but it does not require turbulence nor viscosity. Thanks for the demonstration.
I like your demonstration and your old style pen
Very well done. Thanks for the explaination so thoroughly
FYI, this application of the Venturi effect is known as an injector, there is a neat Wikipedia article on such devices. They used to be used to pump water into the boilers of steam locomotives using high pressure steam from the boiler.
Great demo! Like the Mathias practical science to woodworking.
I think that's how carburetors work. The engine pulls in air by the vacuum created from the piston on the intake stroke, and then the flow of air causes the fuel to come up to be mixed with the air (like your spray gun example). :)
"don't try this at home" has no impact on people trying it, and even if you try it and hurt yourself, it's your problem, not mine, regardless.
thank you needed this for a research paper mazing explanation simplest way you could. great interesting video
Great explanation. Appreciate the visual
Since your spray gun hose (straw) is placed in front of the compressed air nozzle, I would argue that the drop in pressure is caused by the Bernoulli Effect - fluids in an area moving faster than the the surrounding area possess less pressure. Since the air moving across the top of the straw is moving so quickly, the pressure drops and causes suction through the straw.
Granted, I was a music major and my knowledge of the Bernoulli Effect is limited to its effect on vocal folds! Also granted, I had never heard of the Venturi Effect until just now.
Thanks for learning me so good!
Matt Wallace Well, since all the air around me isn't moving either, I should then experience a tremendous vacuum from all the air that is not moving, according to your explanation.
Matthias Wandel Matt Wallace The Venturi effect is a subset/example of the Bernoulli Principal. Either can be explained by particle replacement or the pressure/speed-of-flow relationship.
Matthias, going off of Matt's explanation, we do experience pressure (not vacumm) from the air that is not moving ~1 atm of pressure. That applied pressure is actually quite important for biological functions!
Some people can actually feel pressure differences caused by storm systems because the pressure inside their body is not equalized properly and then the pressure differential is then felt as a force on their joints, for example.
Matthias Wandel Bernoulli's equation is a relation between speed and pressure along a single streamline, that is, a path taken by particles through the fluid.
It's not valid in this case because Andrew is trying to compare different streamlines, and because the flow is unsteady. (In fact, the pressure in the jet is more or less atmospheric!)
The suction is (as you stated) due to the deceleration of the jet due to turbulence, which causes a rising pressure gradient. Since the air at the far end of the tube is atmospheric, the air at the jet end is must be below atmospheric pressure, hence suction.
Your friendly neighbourhood engineering student
+Matt Wallace
Bernoulli: Fluid pressure is inverse to velocity.
Venturi: Fluid pressure in a pipe reduces in a constriction.
Since we are talking in very oversimplified terms (compared to actually modeling this with CFD and being realistic about what is happening here), the process would be: #1. The ID of the pipe is expanded when it exits the nozzle into the paper towel roll - most directly relevant to the Venturi principle which relates fluid pressure to pipe ID. #2. The high velocity fluid pushes out the air inside the paper towel roll, and this high velocity compared to the static atmospheric air creates a pocket of low pressure (Bernoulli- ish), which creates a pressure differential that moves air up to fill behind it. That relationship is also the result of the conservation of mass (mass flux in needs to equal mass flux out, the high velocity air going out x the cross sectional area needs to be equal to the velocity of the air entering x the same cross section). It is probably best to phrase this system in the context of the conservation of mass because applying Bernoullis has a lot of requirements, which they would not discuss in music. For example, Bernoullis only applies to inviscid flow, but all fluid is viscous so it will have viscous forces along the inner walls of the paper towel (in the boundary layer). So Bernoullis could only apply outside the boundary layer, and in a pipe this small the boundary layer is significant.
Source: Fluid mechanics is a subset of mech engr, I have BSME, MSME
+CoolRiffz Not sure if i understand (english is not my native language...), but Bernoulli principle can be related with limitations in flow, derived from pressure drop (that comes from viscous limitations) and pressure gains (inputs, pumps, for example). So you can apply in every system, taking in account the real limitations on a system.
That is also how a steam injector works for getting water pumped into a pressurized boiler (eg on a powerplant or a steam locomotive) and how a Giesl ejector creates a draft in the boiler of a steam locomotive. Airbrushes and many paint guns uses this to propel the paint.
Thank you, learning HVAC and this was momentarily mentioned.
This is great! I have a fog effect that is more effective is there is a gap between the nozzle and pipe I use for routing. Thank you for sharing.
You refreshed a memory of a modified Preval sprayer someone showed me how to make in my 1st yrs. of work. Same premise as the airhose mod., just attach tube to a screw on replaceable glass lidded container. When your broke, they work awesome. You gave me some good ideas for paint sprayers though, with your excellent drawings. I have to see stuff happen or you might as well talk Wookie? Thanks.
Great jet engine and good explanation of the venturi effect.
Man I wish I was as smart as Matthias ... I could do fun crazy things like this without either burning myself, or burning the house down... I love watching you fun videos like this
But the explanation is incorrect. It is NOT the "venturi effect", but *entrainment* .
I came here from "Everything Wrong With Man of Steel".
Me too!
That shit is hilarious!
me three
Me four
Me five
Me Six
You must be a fun neighbor to live next to. Thanks again for another great video.
I'm about to make up a new exhaust system for the car and I wondered if the angle of the very end of the tube, plays much of a part in better moving the exhaust gasses? Ie. a 45 degree angle (or less), coming out on one side with sliced section facing the 'wind' or with it facing away from the 'wind'. Just curious about how each might affect things. 2:10
Also explains how an airbrush works. Thanks, i enjoy your vids.
It doesn't surprise me you like that Lamy Safari. Love your videos!
It's a Pelikan pen, not a lamy
Another great video. Thanks
Never!
But I didn't make the rest of the video until I could figure out how to make a good flame!
You did a Great job and thanks for sharing
IIRC the Bernoulli equation relates the speed of a fluid to it's drop in pressure, assuming density and temperature are unchanged. The Venturi effect is when you constrict a fluid stream, causing the fluid speed to increase so the pressure drops.
A jet of air is using entrainment to transfer momentum to the ambient air mass, and may be higher or lower pressure than ambient depending on the nozzle orifice.
Basically, this video is showing a whole bunch of physical effects!
I know this is an old video, but could the exhaust port of a vacuum be hooked up to the intake port of a vacuum to increase the suction effect using the Venturi effect? Or is there diminishing returns?
Thumbs up for learning something new!
Fluid Mechanics for Engineers! Yay!
That pen! I used the same pen during my first year of Junior High! It made me remember older days :)