Pressure and velocity in pipes

[@bharathhemanth444]

Great work Ahmed Elkhatat! Thank you for the software.

[@abduljabbar-rc9bx]

Ahmed sb this is very great full ,Allah give you long life

[@medoKhatat]

Thank You Abdul Habbar, You too Inshaa' Allah

[@felcas]

This looks counterintuitive. Assuming this simulation is 100% correct, I don't understand why flow is the same if I make a section smaller. Like a shower, speed can increase but the flow will reduce.

[@medoKhatat]

This is called continuity concept of mass transfer. The flowrates doesn't change, accordingly when you decrease the allowed path for the flow, it has to increase its speed to maintain the flowrates. Note that the flow rate is a multiplication of fluid speed and the cross sectional area. Hope this makes sense to you.

[@felcas]

@@medoKhatat I need to experiment in real life to understand it better. Thank you. Do you mind if I ask more things to you?

[@chakradharsai]

simply superb simulator for a clear understanding....thank u...

[@medoKhatat]

phet.colorado.edu/en/simulation/fluid-pressure-and-flow

[@nirmal2111]

The link to the software is broken. Can you share the updated link to the software? Thank you.

[@medoKhatat]

Thank you, I checked the link and it works properly. Would you please update your Java.

[@VladimirS38]

Good video! Especially for the newcomers

[@hasibuan626]

Thank You for your video, its help me so much. anyway how if there is the different height between A to B.

[@medoKhatat]

Hight will affect the potential energy of the fluid which will affect the pressure, the higher point has less pressure value

[@hasibuan626]

@@medoKhatat Thats Correct, if You dont mind to put it on your software. Its make better. Thank You so much.

[@medoKhatat]

@@hasibuan626 it's good idea, thank you.

[@princekainth9402]

Very interesting! Thanks for demonstration....

[@delleloteyro7112]

i bought the app, but i cant find the pressure and velocity in pipes

[@Alejo91PA]

Hi there! I downloaded the files but couldn't install the tool. I didn't find a launcher of setup file either... I already have the latest version of Java. Thanks.

[@mitaputri314]

Can this software be used with adding some machine, such as pump?

[@medoKhatat]

Unfortunately no.

[@raymondcaynila8578]

Can you send me the link and how it will to my laptop? What app do i need to download to make it works

[@gmarkahla8004]

Thank you for demonstaration , please i need help, when we have an enlargement in a pipe result a pressure drop in the result, the flow decrease , but how about the pressure ?

[@medoKhatat]

You mean velocity decrease non flow, because flow is a conserved quantity in steady state flow, and can't be decreased unless you have a leak in your system. In enlargement, there is head loss Pressure Loss) but because of kinetic head difference due to enlargment the pressure will increase.

[@alialosh5563]

@@medoKhatat هل هناك حالة زيادة السرعة في المواسير تسبب زيادة الضغط لان في دراسة الحريق فيه معادله بتقول Q= k Root of p فهل ده معناه ان زيادة السرعة بتزود الضغط حيث ان العلاقة طردية بين السرعة ومعدل السريان Q في حين ان فهمي العام بيقول ان زيادة السرعة بتقلل الضغط

[@medoKhatat]

@@alialosh5563 دعني أعيد كتابة المعادلة بشكل أوضح Q=K*Root(dP) هنا زيادة السرعة تزيد (فرق الضغط) وليس الضغط نفسه ، وكلما نقص الضغط زاد فرق الضغط

[@hirokageyama4422]

how to ope the application i already download the file but i cant find the application in folder

[@medoKhatat]

You may need to update Java on your computer

[@docd7779]

Neat teaching tool :)

[@medoKhatat]

Thanks 😊

[@masharihamoud9156]

please we need more like these

[@medoKhatat]

Thanks a lot, sure Inshaa'Allah

[@dastring]

Hi. I tried the link but it says "forbidden. You don't have permission to access /en/simulation/legacy/fluid-pressure-and-flow on this server." Could you repost the link please? Trying to understand the pressure/velocity/flow relationships and love the graphics. Thank you!

[@medoKhatat]

Try another browser, It may work.

[@matthewjoyce2670]

You rock! Thanks

[@medoKhatat]

Thanks

[@minkhantnyar6429]

Thank you, Sir

[@suryapoudel]

how do i run this soft ware

[@justiceolebogengseupe8607]

cool stuff. can you please teach us how to calculate the hydraulic speed in the network of ten pipes of the same size and length

[@medoKhatat]

Hi Justice, it depends on your volumetric flow rate and the diameter of the used pipe according to the following equation (Q=A*v). The Q will be divided equally from the source to the 10 pipes if they have the same diameter, if not, then apply the previous equation.

[@Asad-kw3ty]

What is the name of this or such software?

[@medoKhatat]

Its Java, I put the link in the description

[@tj7269]

how to get this software?

[@medoKhatat]

Adamking 清风 it's free phet.colorado.edu/en/simulation/fluid-pressure-and-flow

[@awanishvishwakarma7402]

How to download this software

[@Srk7028]

@@medoKhatat link not working.

[@amirjamal2598]

How to download software

[@muhammadalirahimimokarram2787]

Hi dr What is the name of this program you are use in this video ?

[@medoKhatat]

Hi, I put the link of it in the description

[@muhammadalirahimimokarram2787]

@@medoKhatat Thanks

[@ashutoshmishra1383]

Which software use

[@vinaysarai1969]

Please mention the relation between Inlet pressure and flow rate if we know pipe id(neglecting pipe friction factor)?

[@medoKhatat]

Vinay Sarai flow rate is a conservative quantity, so it doesn't been affected.

[@7184ppl]

what is the name of this software

[@medoKhatat]

It has been developed using Java, you can find the link in the description

[@رائدالهايس]

شكرا

[@medoKhatat]

العفو

[@jeffreydaclan1035]

they say that decreasing air pressure increases its speed, can anybody explain to me why? please? i cant visualize it, nor makes sense when i do... i mean a bigger tube has bigger volume, if we have a part of the tube where we decrease the circumference of the tube by making it smaller then wont the pressure increase thus also pushing the air faster?????

[@medoKhatat]

It's a rule called Bernoulli equation. However if you want to imagine it to make it makes sense, imagine that you are drinking a juice with a straw, by sucking the juice you suck the air above the juice and apply a vacuum this makes the juice goes faster to your mouth. The more suction you make, the move vacuum and the faster juice. Does it make sense now?

[@desertrose7778]

Did you created this program!? It is awesome!! 👏👏👏

[@g18210]

What about the pressure when the area is getting smaller ? Increase or decrease ?

[@medoKhatat]

When area decrease, the kinetic velocity will increase, accordingly the pressure will decrease

[@g18210]

Ahmed Elkhatat Bernuli theorem

[@medoKhatat]

ATHENS FZR exactly

[@nurzaimahabdullah3816]

May i shared it to facebook?

[@medoKhatat]

Sure!

[@arpanjena4595]

Is pressure of flowing water in a pipe is same as hydrostatic pressure of water ???

[@medoKhatat]

No, because it is affected by pressure drop due to friction

[@durgab.k.2051]

very useful....

[@waqasqazi6506]

Hello! Can this software by bought or downloaded from the internet anywhere. It seems very useful for my work.

[@medoKhatat]

phet.colorado.edu/en/simulation/fluid-pressure-and-flow Good Luck

[@nageshalla5852]

What happens in case of AIR instead of liquid

[@medoKhatat]

Air also makes friction and leads to pressure drop. However, the pressure drop is very small in comparison with liquid as a result of its tiny desity

[@trifonstefanov8044]

Can someone explain to me how to calculate the pressure from radius and flow rate in a pipe?

[@trifonstefanov8044]

Lets say the pipe is 6-8mm and the water flow is 10m^3/s

[@medoKhatat]

@@trifonstefanov8044 If you have the pressure at any other point along the stream, you can calculate the pressure at this point by applying Energy balance equation.

[@trifonstefanov8044]

@@medoKhatat I know, I have calculated the pressure lose from the turbulent flow that occured due to the surface of the pipe, and because I saw your simulation, I woundered how do you show pressure within the pipe. I have initial water flow and radiuses of the pipe but no pressures. Ok, I understand it is impossible to calculate without a known pressure at some point in the system. Thank you

[@alliswellaio3389]

If there is bending of pipe,what will be the forces

[@medoKhatat]

Bending in the pipe will affect the pressure head, thus there will be head loss (minor) due to that bending. according to the bend type and degree there is (K) values in reference books

[@bshydro]

very interesting :)

[@JuanManuel-kj9fu]

interesting, i'm no scientist, but i'0m looking to calculate when turbulence begins inside a steel pipe, coudl you help me ?

[@medoKhatat]

What do you mean by calculation of turbulence ? do you mean pressure loss due to turbulence or turbulence velocity of the fluid in pipe ?

[@lolchannel581]

make a software for vertical and spiral pipe

[@arpanjena4595]

"Pressure of Water in a pipe at a section of pipe is the compressive force on the pipe at that section of pipe." Am i correct??????

[@medoKhatat]

Yes.

[@gouthamkumar1750]

It's tensile cause fluid exert force outward on all direction when it has positive pressure....

[@tohoku45]

very interesting

[@rogerhupp3115]

The mouse sounds like one of those 1970s tv remotes.

[@medoKhatat]

Roger Hupp :D

[@sadiqpasha1153]

sir please tell me formula?

[@dobbinrajqwerty]

Speed is scalar 😅

[@anandsharma9509]

yess

[@iknowiamcool7917]

Who is here from eLearn

[@ChristosRym]

Video title should be: "Flow and velocity in pipes" and NOT "Pressure and velocity in pipes"

[@medoKhatat]

Thanks Christos, but The relation between flow and velocity is so simple and doesn't require any simulation, (Velocity=Flow/Cross Sectional Area), once you now your cross sectional area, then you can get the velocity. However to get the pressure drop, then Bernoulli equation should be applied which require simulation of kinetic head, potential head and head loss due to friction