How a Piezometer Works

This video shows what a pizeometer looks like and shows how to derived the equation that is used for calculations.

[@danielmtz9488]

With a very clear voice and practical explanation is easy to understand, even for people that speak little english Thanks

[@suckedcaprisun-9982]

I’m german but since i didnt find a german explanation to this, i looked at your video, and even i can understand it!

[@muhammadhaeef432]

im surprised why every good teacher on you tube only

[@Honeywell888]

where is your verb? your sentence doesn't make any sense.

[@andysouthkorea4003]

Very simple, much help. Thanks.

[@noahmickelun1054]

well from what I've studied, the pressure at point 2 isn't exactly 0. It would be equal to the atmospheric pressure. And I also believe that the pressure at point 1 isn't in the middle but rather at the edge and at the bottom of the piezo-tube, since the pressure in the middle of the pipe would be the dynamic pressure (since the fluid is obviously moving)

[@knarikelichai7326]

Awesome explanation thank you!

[@sumanjacobs6]

sir, why are we taking specific value to measure the any pressure

[@rahultiwari4583]

can a piezometer be used to measure the pressure of a compressible fluid?

[@freefiregamer1849]

Thank you! Finally i got it.

[@md.anikmahmud4269]

Thank you, great video

[@princeabraham1100]

Is piezometer an application of Bernoulli's equation? Or is it related to Bernoulli's equation?

[@Satya17888]

Which software u used??? Plss tell

[@thobiaspaim6280]

great video! what board app are you using?

[@Luiferhoyos]

Finally I can unerstand it, thank you.

[@sibasisdas3522]

water pressure in pipe line at a point is shown by inserting piezometer and water enters in piezometer. Is it due to pascal's law or not.

[@bradhelland6634]

If the water is flowing in the pipe, does this change any of the math?

[@nusratjahan5281]

why piezometer ring is used?

[@akshaysawant7278]

Very nice work sir... Subscribed u😘😘... Can u explain how water flow rate is measured flowing through dam?... i.e. in cusec... Plz sir

[@MelissaThaw]

great! thank you!

[@shermuhammad3441]

very nice video.

[@Ziijiang]

Hi, I am interested in what is the software you used here? This is so cool and can auto-correct hand writing drawing into a smooth cirve

[@YoloLollipops]

Let me know if you know

[@charliesnowmelt]

@@YoloLollipops answer has been found (see other comment reply)

[@CraigBass1988]

Great video, Donald. I always find it strange that american tutors seem to use specific weight, whereas over the pond in England we seem to take an extra step and take the product of density and gravity. Perhaps it's just a quirk of our respective countries.

[@DrDonElger]

Craig Schofield Nice that you noticed this difference!! I have noticed the Civil Engineering references tend to use specific weight. Other references, e.g., Mechanical Engineering, tend to use the product of density times gravity.

[@CraigBass1988]

That is a great point, Donald. I must admit, at least from my experience in the UK, fluid mechanics seems to be the only course in which we don't use weight density. Whilst studying structures, soil mechanics, etc. we've always used weight density (kN/m^3).

[@matthewdickinson5097]

+Craig Schofield Specific weight is by definition the product of density and gravity. You may be confusing specific weight with specific gravity.

[@tajammulkha_n6791]

@@matthewdickinson5097 yeah quite true

[@dheerajkumarshrivastav2711]

is it suitable for measuring pressure below ambient

[@DrDonElger]

For pressure less than ambient, consider a different device such as a u-tube manometer.

[@vivekkumar-py6kp]

At 1:07 why water moves upward?????

[@ambikarai8702]

I think it moves upwards due to capillarity 🤔

[@georgiosapostolides1944]

Why is the pressure at point 2 equals to zero?

[@DrDonElger]

Because I am using gage pressure which is the difference between local pressure and atmospheric pressure. A gage pressure of 0 kPa means that the pressure at this point is equal to the atmospheric pressure.

[@agnishekhar8205]

can peizometer be used to measure the pressure of only the fluid which is in motion??

[@DrDonElger]

The piezometer measures the piezometric pressure of a flowing liquid. If you know the local atmospheric pressure and the elevations, then you can calculate the pressure of the liquid that is flowing.

[@sangeethpmohan9223]

@@DrDonElger sir how can we apply hydro static law on the flowing fluid region?

[@DrDonElger]

@@sangeethpmohan9223 Good Question! In the vertical direction, the forces on a fluid particle are weight and pressure only. This is same as in a stationary fluid. Thus, in the vertical direction the same equation applies to both a stationary fluid and a flowing fluid.

[@ghannammohamed107]

wait ... but the pressure at the point 2 is equal to the atmospheric pressure not 0, isn't it ?

[@karrarjasim8201]

Yes, but he had calculate gauge pressure .

[@fredleejohn4144]

people : what this gotta do with life? job for gaining salary : the hell your life.

[@lukmanali6426]

why is it taken from the middle of the pipe?

[@DrDonElger]

Lukman Ali. Good question! The pressure variation across a section of a pipe is hydrostatic; thus, the pressure will vary linearly with radius and the pressure at the center of the pipe is the average pressure. If you use this value of pressure in your calculations, this will be give you the most accurate results. Thus, engineers nearly always apply or measure the pressure at the center of the pipe.

[@lukmanali6426]

thank you :D

[@sivachaitanya5696]

@@DrDonElger will the elevation(h) change if we change the diameter of the piezometer?

[@Mech.Masters]

I have learned that piezometer is used to measure static liquid pressure,then why fluid is moving

[@DrDonElger]

In fluid mechanics, hydrostatic means that the sum of the weight force and the pressure force acting on a fluid particle is zero. The fluid can be flowing; example flow in a river or a pipe. As engineers, we say that something is "static" when the sum of the forces is zero. This body may be moving at constant speed and still be static.

[@Mech.Masters]

Donald Elger ohh,i got it now...thanks a lot friend...(y)

[@tajammulkha_n6791]

In Physics static means inertial frame of reference---the one in which net acceleration is zero & body can thus have a constant velocity.

[@fahadiqbal6712]

delicate is

[@shree_7097]

anybody else bothered by the missing arrow for indicating 'h'?🙈

[@harishgoud1010]

🕵️🙏

[@Encardioritegroup]

Great video, Donald! Visit www.encardio.com for more details.

[@rahultiwari4583]

can a piezometer be used to measure the pressure of a compressible fluid?

[@DrDonElger]

A piezoemeter is best used for measuring the pressure of a liquid, not a gas. Liquids in steady flow are commonly modeled as a material that is not compressible. For steady flow of a gas, one could use a manometer which is similar to a piezometer and also very simple.