Hi, Sir There is something that I don't understand. According to affinity laws (d1/d2)^3 should be equal to relation in power P1/P2 but it's not. (300/350)^3 = 0.6297 2450/3593 = 0.6818 Could you explain why the affinity law doesn't work here?

Hey sir, thanks for this amazing knowledge! I would like to ask, what would it be if we combined two pumps in parallel, but each one have different pressure & flow-rate?

Thank you!!

Very well explained, thank you.

Hey professor, I like your videos; nice approach to the topics. Could you create a video on hydraulic turbines, and possibly include steam turbines as well for comparison?

Thank you, oaglobalcc!

insightful

I'm impressed on the way you demonstrate it in a so simple manner!

thank you

Brilliant video. One question - when cavitation occurs, will we always see this significant drop in pump head (greater than 97% drop) relative to normal operating conditions? Would this be a good troubleshooting indicator for cavitation in pumps? Can we have a scenario where you reach cavitation within the pump, but the fluid gains enough pressure to go higher than vapor pressure just barely at the discharge at the pump, hence the manometer-vacuum reading doesn't drop to 3%?

hello,thank you for your training,it seems that DELTA A is calculated incorrectly . am i correct?

thank you ,it was great, you explained it clearly

I found this to be very useful. Thank you

Hi sir, could you please explain the centrifugal pump selection video and the process of updating the API data sheet?

Sir, I want to ask you how height is directly proportional to square of diameter?

Thank you, Marcos! Great video.

From India good content and best explanation ❤

This was very helpful. Thank you so much

Great video professor, thank you very much for all your work. You have a new sub! <3

Thank you sir please make more

This was very informative, and I was able to understand the concept very clearly. Thank you. .

Fascinating demonstration! I applaud your motivation for producing such enlightening videos.

Thank you for your explanations. Does it also work the same way for ventilation fans? Im a designer and build a paint booth were I like to run identical fans in parallel to suck air.

Thanks. It is great share.. Could consider doing a video on centrifugal pump operating in parallel, especially when both the pump don’t have the same performance curve..

what does k represents?

Thank you so much for creating these videos Mr. Vianna. You are able to break down these complicated subjects and make them understandable even for slow minds such as myself. You truly do have great talent in teaching and vast wisdom regarding fluid mechanics and hydraulics. Your videos have been of great help to me, and I truly do appreciate it. Thank you!

Means free pumping power with three waste valves

Thanks for this nice video lessons. Slides need little modifications. In 5:55, D1=350mm and D2=300mm

Never learned about pump in this manner!!!! 😮 Thank you for sharing your knowledge

Do you have a website Dr. Vianna? Thank you

Brilliant Explanation. Thank you for your effort. You are a great Professor and a good friend.

Very beautifully explained. The explanation is very easy to understand. Thank you very much.

Interesting... Thanks for sharing.

Great video ❤. Very informative

💔 *promosm*

Hi Doctor, we are now going to start designing a pump impeller for a rocket engine, but this pump is of high speed and performance and works on liquid oxygen and liquid kerosene. We are in the United Arab Emirates and we will start work from the next half of the month.

Shm 50/26 n curve

👍

That's a great video, Professor Vianna! You always simplify hydraulic concepts. I'm writing some functions to calculate hydraulic systems in Python language and I will include a function to do this calculation!

Thanks for the video Sir😊

very nice explanation sir

It is Pi abs which is in different color at 4:23. The absolute pressure at eye of the impeller.

That was great, professor! I could say: the best YT for Hydraulic Engineering.