Venturimeter theory and working

[@Liz-ye1qi]

Thank you! This was awesome! I had one questions, how do you derive the definition of height hm?

[@intansuraya675]

Nice explanation!

[@omkartripathy8925]

How you got the formula for h interms of hm and what is h. Can you please explain.

[@Dr.AmitMandal]

You can go through the theory of differential manometers..

[@vijayabhaskarareddy1820]

I couldn't get ,, can you please explain

[@samimmolla9923]

Explanation excellent sir, But I have one question if I am wrong anywhere I'm sorry... In case of bernouliis equation energy per unit weight so pressure energy means pressure *volume (P*V) and we obtain the head by dividing the pressure energy per weight means P*V/mg... Datum head means mgh /mg and velocity head means 1/2mv^2/mg..so why u write the difference between P1-P2 =mgh? can you please elaborate this things because mgh is Z (datum head)

[@Dr.AmitMandal]

+Samim Molla all heads have same unit i.e. meter. Go through my lecture over Bernoullis theorem...

[@samimmolla9923]

Sir I have seen Barnoulis theorem which you have made...it's a very good explanation....how pressure energy is converted into a pressure head?? Please...

[@Dr.AmitMandal]

+Samim Molla head itself is not energy, in case you multiply mass flow rate of fluid with head you will get the energy content...

[@Dr.AmitMandal]

+Samim Molla i have written p1-p2 = ro g h.

[@samimmolla9923]

Oh extremely sorry sir, I got it..... Sir I have one request that if u upload a video of pump cavitation and npsh.. It will be very helpful for me...

[@skarya4501]

Why is the venchuri meter take of convergent part distance 2.5d and divergent part distance 7.5d

[@Noxyy9999]

H amit , it is not clear from the lecture , wha you mean by h? , is it the hight of the Venturi tube ?

[@Dr.AmitMandal]

In the venturimeter the liquid is mercury, however the liquid in pipe is water, we cannot keep the height difference of mercury in the flow rate formula, thus h is the equivalent height of water compared to mercury, for better understanding consider thery of differential manometer.

[@Noxyy9999]

Thanks Amit. but im not sure what do you achieve when you apply the EQ H = (Pm/Pf -1)* hm ?

[@anirudhajagdale8813]

sir how you got the formula for h from hm & density's if made another video on that please give the link

[@Dr.AmitMandal]

watch my lecture on manometer and pressure measurement

[@SHUBHAMKUMAR-xj2yt]

Why do we not connect manometer in between throat and diverging section

[@Dr.AmitMandal]

Ideally, no problem..

[@ehtshamurrehman2506]

good

[@MrSatyam20]

Good explanation sir.