Will definitely use your approach tomorrow on my final. This method is very simple to use, and my professor wouldn't have us iterate it all the way out anyways, just describe what our next step would be. You rock!
Why is the velocity head looped in to the constant ht at the junction? Intuitively, due to the change in area, I would assume this differs between the 3 pipes. Continuity is based from the flow rate, or Q=Av, so the velocity change could make a large difference.
Great solution! What would happen if you plug in your multiple choice answers and work backwards? No more than 3 calcs. Take that you evil senseless 3 rez problem!
Good approach but disagree with the comment of "this type of problem has no practical application." This type of problem occurs at any T in a system. The reservoirs are only symbolic of the HGL at the end of the pipe. For example, most people are familiar with the toilet being flushed when someone is in the shower. THAT is a classic three-reservoir example. One supply line(reservoir) feeding two reservoirs (shower and toilet). Great problem to make sure you understand the correct application of the energy equation. I didn't take time to check his numbers, so the JP Contruction comment may be right?
This is wrong!! The approach was correct but he must be a teacher and changed up his numbers and didn't double check his work. In this video only the V1 is correct. Notice at 70ft his f values to be .02 and he calculates his V to be 5.67 at 90 ft and at 70 ft with f value to be .02 v=31.08..... LET ME SAY THIS MORE SIMPLY: The only way you can get V1=5.67 at 90 ft is if your f value is at .2 But Thank You...If it was not for you I would have not figured out the correct approach. Don't be afraid of this video as it's awesome. Just don't be afraid if you find a mistake later on.
Will definitely use your approach tomorrow on my final. This method is very simple to use, and my professor wouldn't have us iterate it all the way out anyways, just describe what our next step would be. You rock!
Why is the velocity head looped in to the constant ht at the junction? Intuitively, due to the change in area, I would assume this differs between the 3 pipes. Continuity is based from the flow rate, or Q=Av, so the velocity change could make a large difference.
Thank you so much!
They didn't explain this and then set a four reservoir assignment.....
Hi guy! For this question did you assume the pipes have a fully rough turbulent flow?
Great solution!
What would happen if you plug in your multiple choice answers and work backwards? No more than 3 calcs. Take that you evil senseless 3 rez problem!
Good approach but disagree with the comment of "this type of problem has no practical application." This type of problem occurs at any T in a system. The reservoirs are only symbolic of the HGL at the end of the pipe.
For example, most people are familiar with the toilet being flushed when someone is in the shower. THAT is a classic three-reservoir example. One supply line(reservoir) feeding two reservoirs (shower and toilet). Great problem to make sure you understand the correct application of the energy equation.
I didn't take time to check his numbers, so the JP Contruction comment may be right?
very big help! thanks!
flow thought pipes is case of water is always taken as turbulent, friction head loss will be different
thank u sir
when i u use his formula for v1 husing his values i get a different answer. what is g? isnt it 9.91? where is he getting 32.2?
Standard units, g = 32.2 ft/s^2
notice that the elev and diameter are in English units. The g for English unit is 32.2 while in S.I. it is 9.81
This is wrong!!
The approach was correct but he must be a teacher and changed up his numbers and didn't double check his work. In this video only the V1 is correct. Notice at 70ft his f values to be .02 and he calculates his V to be 5.67 at 90 ft and at 70 ft with f value to be .02 v=31.08.....
LET ME SAY THIS MORE SIMPLY: The only way you can get V1=5.67 at 90 ft is if your f value is at .2
But Thank You...If it was not for you I would have not figured out the correct approach.
Don't be afraid of this video as it's awesome. Just don't be afraid if you find a mistake later on.
answer should be 99.81 for the values he gave for ht
a very sexi soloution ......