Bernoulli's Equation Example Problems, Fluid Mechanics

Bernoulli's Equation Example Problems, Fluid Mechanics - Physics

Рет қаралды 680,200

6 жыл бұрын

This physics video tutorial provides a basic introduction into Bernoulli's equation. It explains the basic concepts of bernoulli's principle. The pressure is high when the velocity is low and the pressure is low when the fluid flow is high. Also as the height increases, the pressure decreases. This video contains plenty examples of calculating the flow speed and the water pressure in different sections of a circular pipe where the height, radius, and cross sectional area changes. This tutorial also explains how to derive the formula for Bernoulli's equation using kinetic energy, potential energy, and mechanical energy.
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Пікірлер: 246

@TheOrganicChemistryTutor Жыл бұрын

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@Tocket03 5 жыл бұрын

@ 14:26 he said that p2=250000/98000 it's actually supposed to be 250000-98000. I'm pretty sure that's what he meant and just got his words jumbled up. Wanted to clarify in case someone got confused.

@Mr.V. 5 жыл бұрын

Actually everyone noticed it but all stayed quite.

@HorizonSpeed26 4 жыл бұрын

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@pmmeyourdadjokes9811 4 жыл бұрын

thank you, I was worried because was finally feeling like I understood this stuff and then this confuses the crap outta me

@jeremylim2235 3 жыл бұрын

Thank you for clarifying that!

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@LuistrAmalgo 2 жыл бұрын

I found that P decreasing because of an increase in v as the radious of the pipe gets smaller to be counterintuitive at first.

@christomold3142 2 жыл бұрын

Great job!

@renagibala5509 4 жыл бұрын

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@user-yj3gq6rn7d 7 ай бұрын

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@nlee1021 Жыл бұрын

In the 3rd problem, the arrows for the direction of flow were assumed at the beginning and never reexamined which causes some confusion. The water must be flowing uphill (from c to a) because the direction of flow is always from high pressure to low pressure.

@triet228 3 жыл бұрын

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THANK YOU

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@Manuel-of7et 3 жыл бұрын

why was "delta P" written as P1 - P2? I'm confused, isn't "change in" always final - initial(P2-P1)?

@giannidecrescenzi7470 5 жыл бұрын

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@boranagujjii......7800 4 жыл бұрын

thanks

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@erkanduzgun7995 4 жыл бұрын

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@vamshicrazyshorts6283 Жыл бұрын

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@boranagujjii......7800 4 жыл бұрын

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@alisattarzade5424 4 жыл бұрын

Could you please answer a question for a 3 example.How water flow point P2 to P3? because from calculations we got p3>p2 and we know fluid flow from high pressure to low pressure but in this example at exactly from point 2 to point 3 fluid flow low pressure to high pressure. How it can be possible?

@ibrahimkantar2402 4 жыл бұрын

Isn't it confusing ? P=F\A right. So , when the area is decreased to 2 , doesn't Pressure need to be higher normally ?

@uwemasuquo Жыл бұрын

Please Change in Pressure is always P2 - P1. Why is the reverse the case in derivation of the Bernoulli's equation? God bless you Sir for making physics simple.

@ok-vv5vo 2 жыл бұрын

at 26:00, Instead of taking the value of A and C I instead took from B and C and got the same answer. I did (496000) + 1/2 (1000)(10)^2 = P2 + 1/2 (1000)(5)^2 .. Is this a coincidence or just another way to solve for the same problem?

@jacksonbauer5199 10 ай бұрын

For question 2, what is the distance between points A & B? Without the distance or the amount of time it takes to travel from A to B at 4 m/s, slope cannot be calculated. I am no expert on this topic, but it seems that a 10 meter increase in height over the span of 1 meter would yield a different result than a 10 meter increase in height over 10 Kilometers. Am I wrong? Did I miss something?

@sumankumardash5241 4 жыл бұрын

thanks sir

@Ashley-dh8oy 2 жыл бұрын

If pressure is force over area, wouldn't that mean area and pressure are inversely proportional? So why would decreasing area also decrease area? Is that like a special relationship where the force overcomes that?

@AhmadTalkss 5 жыл бұрын

at 14:34, why cant u use the pressure head, h = p/lambda p = (10)(9800)

@intan6409 3 жыл бұрын

Thhnnkk uu... But why we have to divide with area and volume when derive the equation

@DystopicEdits 3 жыл бұрын

Can someone explain how the height is calculated and why it does not change?

@gilmarmarostega7792 4 жыл бұрын

EXCELLENT TEACHER!!!

@t.srivallabh2461 4 жыл бұрын

Relaxing Voice

@illestneo 4 ай бұрын

at 26:00 why is that when i use the pressure at B as P1 and the pressure at C as P2 and substitute the values to get the pressure at C(P2) i get a wrong answer :(

@rishi_kumar892 3 ай бұрын

Hi I just wanted to ask, that we were deriving the second question and the third question with the same image but In the second one we used 17:15 W=PE But for the third question we used 29:04 W=ME or W=PE + KE Can anyone explain why did we do this?

@ICantSeeYourRepliesDickhead Жыл бұрын

If velocity is constant throughout then cancel out the one part and if height is constant then cancel out pgh

@Megha-rv2hd 3 жыл бұрын

Amazing 👍👍👍😍🤩video

@johnnyedemagboado4742 2 жыл бұрын

Please I have a question: The pressure required to prevent crude oil from entering a plug core of a finely divided reservoir solid rock is twice as great for a liquid of surface tension 50mN/m, which completely wets the solid, as it is for a liquid of surface Tension 70mN/m, which has a finite contact angle with the reservoir solid rock a)calculate the contact angle b)What is the importance of the contact angle calculated

@johnnyedemagboado4742 2 жыл бұрын

Please do help me solve it

@LivingLarrystyle 8 ай бұрын

How come for question 3, we assume that the velocity btw a and b will be the same with the same area, however later on it was mentioned that with a high drop there is an increase in pressure which would lead to and decrease in velocity? Shouldn’t the velocity at B decrease?

@FeraleHubbard 4 жыл бұрын

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@albertalcasid6755 5 жыл бұрын

i hope i got this right

@ZULFERISYAHPUTRA 3 жыл бұрын

Dear Sir............Example Problem : One hydraulic cylinder, the end is connected to the Threaded rod so that it can be rotated. Cylinders with a bore size of 18 mm, 10 mm rod and a stroke of 300 mm single acting in a condition that is filled with oil. If the cylinder is rotated 10 mm. a. How to calculate it b. What is the gauge pressure