Reynolds number explained.

[@FranzBond007]

Thank you for taking the time to do the explanation. Re4200=turbulent ONLY applies in closed channels such as pipes, not for external flow such as airfoils.

[@AliyaBurkit]

That's true, airfoils have much bigger Re

[@FranzBond007]

@@AliyaBurkit Yes, turbulent flow happens beyond a Re of 5X10^5, I recommend reading in chapter 10 of Cengel and Cimbala - Fluid Mechanics 4th Ed, the section of boundry layer development over flat plates. Keep doing science videos ;)

[@AliyaBurkit]

Thanks! I will do another video about Re

[@thekamakals8492]

This is called beauty with knowledge

[@AliyaBurkit]

😅😅

[@thekamakals8492]

@@AliyaBurkit where are u from

[@Kadz25]

@@thekamakals8492 weird guy

[@claramelb7476]

Thank you! I finally understood the Reynolds number :)

[@AliyaBurkit]

That's great!

[@abaytuyakov6055]

@@AliyaBurkit are u from KZ?)

[@AliyaBurkit]

Yes 🇰🇿

[@krishpatel5162]

@@AliyaBurkit what is kz? Form India'👍🏻👍🏻

[@Anish-IITP]

@@krishpatel5162 khazakistan

[@Obamnaz]

This is my favorite video on KZbin

[@balajilakshminarayan1593]

Very well explained. I am from electrical background and still able to understand every bit of this video. Thanks!!!

[@LeoH3L1]

The tranistion point is incorrect in this video for a wing, 2100 to 4000 is for flow in a pipe For a wing, without inducing it by changing the AoA, it is about 500,000, eg the variable is velocity only. To induce it by stalling the wing the transition point is about 50,000. Using the transition value for a pipe and applying it to a wing is common mistake people make when dealing with Reynolds numbers.

[@thethirdman225]

It was still a very good explanation but thanks for clearing that up. I’ve been skirting around this for decades and she made it much clearer but I was a bit surprised that the figure was so low and I thought she might have omitted a zero or two.

[@mohamadfahrulradzi7126]

help me a lot to solve my Fluid Mechanic project, Thanks so much. Love from Malaysia

[@AliyaBurkit]

Happy to help

[@reeceengineering]

Good job. If you could make a video explaining how to scale airfoils up and down to maintain RE, that would be good. Theres a burst of RC Airplanes being designed right now and we are all wanting to properly access existing airfoils, which will involve scaling them down.

[@AliyaBurkit]

Great suggestion! Thank you!

[@charchitgaur9929]

Excellent Aliya mam I understood it's👍

[@AliyaBurkit]

Great 👍

[@vibinhigh_]

Thank you for video. Love from pakistan. Finally understand renold number

[@tebogo.]

Just what I needed🙌

[@LindoMtsweni]

Did you say the Reynolds numbers will be same for the wind tunnel testing and the real size plan ??

[@AliyaBurkit]

Yes

[@TheMrMEEEEE]

You're awesome. Thanks for the clear and concise content.

[@manjpoooeg4x]

Basically your English is very easy to understand from India Your English is better and so good

[@AirlinesDisasterAnalysis]

It was really splendid...

[@AliyaBurkit]

Thanks so much!

[@akarshsudev6277]

Finnally got a perfect explaination!!

[@AliyaBurkit]

Glad to help!

[@Sondus-yu5hl]

hey, Aliya I have a question, please. if a steel pipe with a diameter 0.02 m is used to deliver jet fuel from the tank to the engine of an aircraft. The jet fuel has a density of 900 kg/m3 and kinematic viscosity 5×10-6 m2/s. If the engine burns 1000 kg of jet fuel per hour. what would be the Reynolds number of the flow?

[@Sondus-yu5hl]

if you want you can contact me on Instagram @khouli.s

[@AliyaBurkit]

I will answer that later. I want to do a video where I solve problems that you guys asked here

[@R_Alexander029]

Hi I'm a bit confused, I understand that the effect of low Reynolds number on an airfoil is increased drag and decreased lift. Which is more desirable, a high or a low Reynolds number for a wing airfoil?

[@skillway]

XFOIL showing a minimum reynolds number of 500000 for sd7032 airfoil shape.. Why is it like so..

[@rishipuri2355]

Thank you for clearing my doubts

[@AliyaBurkit]

Glad I could help

[@rishipuri2355]

@@AliyaBurkit 😊😊

[@fernandofreitasalvesdelima5867]

Thank you for teaching Me this Reynolds number!!!

[@theoryofscience7289]

just a question : what exactly 2100 and 4000 refers to speed of flow or something else and very nice and detail explaination.

[@mazharameerpg0643]

Reynolds number is fluid so we will define it for gases because we some time deal with gases so how will elect it flow type ?

[@백승원-e8z]

thank you for your wonderful lecture and appearance

[@Fiendnat138]

im doing a wind tunnel report for airfoil 0012 to find reynolds number, i have to use the chord length?

[@bacardistudio1619]

Great Explained 💯

[@AliyaBurkit]

Glad you liked it

[@keerthykiran4266]

doesn't density also change as we go higher (considering the formulae required), then we may not end up with the same reynolds numbers as expected! can i get a fast response on this?

[@andrecarvalho5622]

Airflow that is attached to a wing can be laminar or turbulent.

[@cr-us9ch]

Awesome. Been trying to understand this for years

[@killua9369]

This is amazing! And you are amazing! Thanksss

[@vinayverma2561]

I am making an Rc aircraft. (90inches wings span) So I must keep the Rynolds number between 2100 to 4000?

[@pythonking_stem1527]

these are wrong values....these are Re for pipes(internal flow)... for aeroplane, flow over the wing is an external flow... external flow values have difff range...

[@AliyaBurkit]

He is right, those Re numbers are for pipes

[@javac08642]

Good job, very helpful thank you

[@Bantaikipublic12]

Love From India 🇮🇳

[@ktelegenov]

Great content, Aliya. Keep going!

[@AliyaBurkit]

Thanks! :)

[@marccretten]

Question...maybe its a dumb one but here goes...If Laminar flow is Re4000, what happened between 2100 and 4000?

[@bhanutomer9396]

probable transition, a state where its starting go turbulent from laminar over a period of velocity and time scale.

[@AliyaBurkit]

transient flow))

[@hotscandium6892]

@@AliyaBurkit Laminar flow?

[@TerragonCFD]

Thank you for the good explanation 🙂

[@nammtamilzargal]

I have learnt a lot here..im 16 I have learnt how to make a fluency better and some attitude and I love to learnt from a cute girl like you ❤😘love you

[@heydonray]

VSE (Vid Scoring Equation): ECF (Eye Candy Factor) * EV (Educational Value) = VSE , and in this example 10*10 = perfect score of 100

[@shreyanand2226]

Great video

[@AliyaBurkit]

Thanks!

[@seanteagan7351]

Awesome video, thanks!

[@AliyaBurkit]

Thank you for watching!

[@russellwilson5246]

if partof the equasion for renolds number is cord. how will you arive at the same properties for the model and the full size aircraft?

[@joshuakotzee8029]

Bro, are you dumb ? Do you even understand basic mathematics ? Retarded ahh comment 🤣🤦🏼‍♂️

[@markmisin]

Great explanation! Thank you!

[@AliyaBurkit]

Thank you for watching!

[@mustafa20]

Very good video

[@sagarmohanty2675]

Thank you ma'am 💗

[@AliyaBurkit]

You're welcome!

[@cheasreykhouch5990]

Thanks you your video help me too much 😊

[@JoeHynes284]

love your videos!

[@lekshmyarun4127]

Great tutorial. I understood very well and thank you so much. Btw you look like SOLAR from MAMAMOO

[@santhoshsaravanan2868]

It's so embarassing watching people simping for her instead of admiring what Reynolds says

[@gustavotorres2058]

Love your channel 😁

[@AliyaBurkit]

Thank you! Glad to have you here

[@zzzzzzzz4943]

make a video on prandtl and grashofs no too

[@maniksharma1403]

Prandtl and his gang of scholars Von Karman Nikuradze Blassius Prandtl gave concept of mixing length in 1920~1930s further extended by his scholars

[@rogeriorento9730]

Next video could be about streamlines, streaklines and pathlines.

[@AliyaBurkit]

Thank you for a suggestion! We'll talk a bit more about the lift theory in the next video

[@christianmunozvalenzuela6107]

You must be more carefull about the limit that you say for laminar and tuburlent flow. The values 2000 and 4000 are just for flow in pipes. External flows have other values, check it for the laminar and turbulent limit in boundary layer

[@AliyaBurkit]

Yes, good catch. I want to make an additional video about this topic

[@muditgaur2779]

Thank you❤️❤️

[@AliyaBurkit]

You’re welcome 😊

[@khayaganembashakaran4149]

Thank You for helping out

[@AliyaBurkit]

You're welcome!

[@JLPicard1648]

What happens between 2101

[@tahsinsayednihad6456]

It's called transitional flow, which means it partially behaves like laminar and turbulent

[@gojosan1376]

life

[@asmartguycodename4721]

I am a JEE aspirant, but came to this channel to see u in my free time 😍

[@AliyaBurkit]

Thank you for watching! Hope you found something interesting

[@Tech2Galaxy]

very very brilliant explanation... and you are gorgeous...❤

[@maniksharma1403]

Laminar sublayer theory in turbulent flow

[@jaydhangar3048]

thnqq mam...mam also do numericals based on Re

[@AliyaBurkit]

Yes I will

[@21syrb98]

Thanks you are amayzing

[@drxahasingh7586]

Thank for exp

[@imagine7363]

Why do we need these Reynolds numbers? It's we must survive for another's missiles. That'll help us to protect from those missiles.

[@flybobbie1449]

Pretty obvious that a small model of a plane or wing will react different to a full size. We don't have scaled down atoms to pass over the model.

[@multisola1576]

The flow is the same what are you on about

[@flybobbie1449]

@@multisola1576 Not if atoms are not in physical proportion.

[@ayazdiwan4961]

Hay pyeeri samaj gayi......❤️❤️😂😂

[@muditgaur2779]

Indian har jagah hai bhai

[@AliyaBurkit]

Sorry, don't understand 😂

[@pinkharrier47]

You can add natural teacher to your CV.

[@anshu4607]

Where are you from??

[@AliyaBurkit]

I'm from Kazakhstan

[@anshu4607]

@@AliyaBurkit Okay

[@NoRecentActivityFound]

Thank you

[@AliyaBurkit]

You're welcome

[@godfathercorleone9346]

Woow you soo beautiful !!😍❤️

[@Obamnaz]

I was here for Ryan Reynold's number but now I'm more interested in your number...

[@emeraldgonzaga1190]

Smooth ~

[@zezin9143]

Go to hell incel

[@Captain_puckett]

@@zezin9143bro, its not that deep…

[@haseebulhassan1019]

this Reynolds no value is for internal flow not for external. please pinned any comment related to value.

[@anger9589]

I'm 14 year old , but don't know, why i'm here ? May be i saw a beauty face 😍

[@AliyaBurkit]

Thank you for watching! I'm glad the new generation is still hungry for knowledge

[@conorh4882]

@@AliyaBurkit he's 14, i think he'd watch you read the news lol as would half these commenters ;)

[@AliyaBurkit]

🤣🤣

[@yazan2789]

TY!

[@newmood24]

The values are for internal flow, the video was helpful though.. but i must say the comment section is on a different level, lol. thanks

[@oldhounddog01]

Allya - I'm 68 years old and still study science. No way could I have done this presentation at your age. I will give you one topic to look up to help you grow, check out tensors. If you haven't learned of this yet I am sure you will enjoy it. You will do well in life...

[@souravnayak2624]

I couldn't concentrate on the class. You are so beautiful 😍

[@AliyaBurkit]

😬

[@humblewiz4953]

@@AliyaBurkit ...😅😅

[@walidkhier5640]

A turbulent flow can be attached, and laminar flow can be separated. Your examples are misleading.

[@marcus2110]

👍👍

[@user-fo5jv3zu8jn2]

누님 감사합니다.

[@nicholasgulli6473]

dam you fine

[@unessff]

i love you

[@AliyaBurkit]

🤷‍♀️

[@rishabhsahu6211]

😂😂😂🤣🤣🤣

[@ankajanand1361]

You explain esliye.

[@TheCapedArtist]

No, she explains Ə§ŁĪÝË

[@AliyaBurkit]

Thanks :) that's my strong suite

[@AliyaBurkit]

Haha

[@ankajanand1361]

Where are you from?

[@AliyaBurkit]

From Kazakhstan

[@cubedge7695]

Why don't you make 1 another video to explain it more clearly .

[@AliyaBurkit]

I will

[@omorkhan3437]

where are you from???your accent is so different!

[@rishabhsahu6211]

Where are you from ma'am

[@blueshield2424]

Her eyes

[@qaisjoker8306]

what was the Reynold's formula?

[@anonymoushere7786]

​@@qaisjoker8306😂😂 nice one bro

[@KFRogers263]

This was totally not helpful! Now I want to go back to college and get my Aerospace degree. :P Seriously though, nice explanation. Short, simple, and clear.

[@joshuakotzee8029]

Your comment in itself is so contradictory.

[@KFRogers263]

@@joshuakotzee8029It starts with sarcasm mate. That's why the end says "Seriously though..." sorry for confusing things :)

[@joshuakotzee8029]

@@KFRogers263 ye, i’m autistic, that stuff flies over my head bro.

[@jason.arthur.taylor]

You give an equation for Re, and show a wing at two different angles, but one is turbulent and one is laminar. Yet, you failed to say what in the equation changed to raise Re. (so it is allegedly turbulent). For this reason, I downvoted your video. And so should everyone else.

[@Captain_puckett]

Hey genius all you gotta do is use the equation that she gave and you can figure it out yourself… either one of the variables in the numerator increased or the other variable decreased.

[@jason.arthur.taylor]

@@Captain_puckett NO NO NO. Look at the wings in 1:46. The have the same exact parameters, but one is in turbulence because of the angle of attack increased, which is what she should have discussed if she had any actual awareness of the subject matter she's reading about.

[@Captain_puckett]

⁠@@jason.arthur.taylor she literally did explain it by saying AoA which is all she needed to say because at this point you should realize that Re~u~L/D~CoL/AoA. Asking her to explain why Re changed with AoA (which causes separation) would be circular as Re is by definition the quantification of laminar-turbulent flow. “Re has changed; Why? Because airflow is turbulent! Why? Because Re has changed!” Repeat infinitely…

[@iosifelmoursi1777]

So beautiful

[@AliyaBurkit]

😅🤷‍♀️

[@newmood24]

you mean whats beautiful? the reynold's number or the ..?

[@saltyroe3179]

This explanation is upside down.

[@thiruparishna2529]

U cute

[@ralfhespaldon8810]

hi love u youre cute explaining those reynold number

[@rlgaming6967]

Kon si bhasa h samajh hi nhi aaya di😶

[@abhilashm6711]

Nice one ! Can you give your Skype ,have some doubts...

[@yogeshwaran5213]

u r cuteeeeeee

[@ahmadshabbir32]

R u a muslim