Fluid flow and elevation vs pressure

AI Thread Summary
The discussion centers on the relationship between elevation change and pressure loss in pipes, specifically addressing hydrostatic pressure and head loss due to flow restrictions. A user seeks supporting research for their experimental data showing a negative gradient graph related to pressure changes in a hydraulic system involving both horizontal and vertical pipes. Responses clarify that the scenario likely involves hydrostatic pressure and provide relevant equations and resources for further understanding. The conversation emphasizes the fundamental nature of the principles involved, suggesting that the user may not need extensive additional research. Overall, the thread highlights the importance of understanding basic hydraulic concepts in analyzing fluid flow and pressure dynamics.
lifeisstrange444
Messages
2
Reaction score
0
TL;DR Summary
Request
Hey guys! does anyone have a graph of the relationship between elevation change and pressure loss in pipes? I currently have experimental data of a negative gradient graph. know it's theoretically correct however, I just need supporting research for this - have tried finding everywhere but can't find it
 
Engineering news on Phys.org
Welcome to PF.

There are many interpretations of your question. I wonder what you mean.
Are you referring to hydrostatic pressure reduction, or a head loss due to flow restriction?

Please describe the hydraulic system, and attach the "negative gradient graph" to your next post.
 
Reply
  • Like
Likes DeBangis21 and russ_watters
Hi, a change in pipe elevation. My setup is currently; horizontal pipe into vertical pipe and from the vertical pipe into another horizontal pipe. The last pipe is in partial flow and so im assuming the pressure is atmospheric pressure. I am then backtracking to find P1 (original pressure) - and finding the change in pressure due to the elevation. Attached is my graph - would really appreciate your help, thank you
Screenshot 2024-01-06 at 3.16.47 PM.png
 
Last edited by a moderator:
That appears to be hydrostatic pressure. The equation is here.
https://en.wikipedia.org/wiki/Vertical_pressure_variation

Your coefficient 9961.4 should be close to g * density.
For g = 9.8 m/s2 the liquid is water, with a density of 1016 kg/m3.

What "supporting research" do you require for something so fundamental ?
 

Thread 'Query on Isentropic relationships (such as PV^gamma = constant)'

Hi all, I have a question. So from the derivation of the Isentropic process relationship PV^gamma = constant, there is a step dW = PdV, which can only be said for quasi-equilibrium (or reversible) processes. As such I believe PV^gamma = constant (and the family of equations) should not be applicable to just adiabatic processes? Ie, it should be applicable only for adiabatic + reversible = isentropic processes? However, I've seen couple of online notes/books, and...
View full post »
Thread 'How can I find the cleanout for my building drain?'

Thread 'How can I find the cleanout for my building drain?'

I am a long distance truck driver, but I recently completed a plumbing program with Stratford Career Institute. In the chapter of my textbook Repairing DWV Systems, the author says that if there is a clog in the building drain, one can clear out the clog by using a snake augur or maybe some other type of tool into the cleanout for the building drain. The author said that the cleanout for the building drain is usually near the stack. I live in a duplex townhouse. Just out of curiosity, I...
View full post »

Thread 'Dry sump pump issue'

I have an engine that uses a dry sump oiling system. The oil collection pan has three AN fittings to use for scavenging. Two of the fittings are approximately on the same level, the third is about 1/2 to 3/4 inch higher than the other two. The system ran for years with no problem using a three stage pump (one pressure and two scavenge stages). The two scavenge stages were connected at times to any two of the three AN fittings on the tank. Recently I tried an upgrade to a four stage pump...
View full post »

Similar threads

Flow rate of fluid at a burst leakage in a pipeline due to over pressurization
Replies
5
Views
4K
Pressure profile of a gas flow through an orifice
Replies
10
Views
6K
[Fluid Dynamics] Losses in branched pipes etc.
Replies
2
Views
2K
I Shouldn't the pressure difference along a pipe be a negative number?
Replies
8
Views
1K
Impact of Atmospheric Pressure on the Water in a Tank and a Pipe
Replies
6
Views
6K
Forces appearing on the pipe when a fluid flows in it
Replies
3
Views
2K
Replacing asphalt used on speed bumps with non-Newtonian fluid?
Replies
7
Views
2K
Fluid Flow Equations With Real Values
Replies
20
Views
3K
Doublet flow in Fluid Dynamics between two spheres or cylinders
Replies
0
Views
1K
Water Pressure in an Isolated System
Replies
2
Views
3K

Hot Threads

Recent Insights

Back
Top