Fluid mechanics, help in finding the dancy friction factor

AI Thread Summary
To find the Darcy friction factor using the Colebrook-White equation, an iterative approach is required. Start with an initial guess for the friction factor (f) and substitute it into the equation: 1/√f = -2LOG[(e/d)/3.71 + 2.51/(Re*√f)]. Repeat the calculation with the new value of f until the results converge. An example calculation would clarify the process and demonstrate how to achieve balance in the equation. Understanding this iterative method is crucial for accurate fluid mechanics analysis.
wmsaqqa
Messages
28
Reaction score
0
How to find the dancy friction factor by using the colebrook white equation (not using the moody chart) ; to calculate the 1/√f = -2LOG[(e/d)/3.71 + 2.51/(Re*√f)]

help please
 
Engineering news on Phys.org
The Darcy friction factor is solved using an iterative process. You have to use a starting gues value for f and then plug the answer in and repeat until you get the f's on either side of the equation to balance.
 
can you show me an example for this if there is available, please!
 

Thread 'Bubble formation in 4 mm gap vessel'

How did you find PF?: Via Google search Hi, I have a vessel I 3D printed to investigate single bubble rise. The vessel has a 4 mm gap separated by acrylic panels. This is essentially my viewing chamber where I can record the bubble motion. The vessel is open to atmosphere. The bubble generation mechanism is composed of a syringe pump and glass capillary tube (Internal Diameter of 0.45 mm). I connect a 1/4” air line hose from the syringe to the capillary The bubble is formed at the tip...
View full post »
Thread 'Physics of Stretch: What pressure does a band apply on a cylinder?'

Thread 'Physics of Stretch: What pressure does a band apply on a cylinder?'

Scenario 1 (figure 1) A continuous loop of elastic material is stretched around two metal bars. The top bar is attached to a load cell that reads force. The lower bar can be moved downwards to stretch the elastic material. The lower bar is moved downwards until the two bars are 1190mm apart, stretching the elastic material. The bars are 5mm thick, so the total internal loop length is 1200mm (1190mm + 5mm + 5mm). At this level of stretch, the load cell reads 45N tensile force. Key numbers...
View full post »

Thread 'Find 3D Printer & Software Resources for Prototype Creation'

I'd like to create a thread with links to 3-D Printer resources, including printers and software package suggestions. My motivations are selfish, as I have a 3-D printed project that I'm working on, and I'd like to buy a simple printer and use low cost software to make the first prototype. There are some previous threads about 3-D printing like this: https://www.physicsforums.com/threads/are-3d-printers-easy-to-use-yet.917489/ but none that address the overall topic (unless I've missed...
View full post »

Similar threads

Doublet flow in Fluid Dynamics between two spheres or cylinders
Replies
0
Views
1K
Please tell me the difference in the size of the air volume
Replies
3
Views
1K
Damping and friction in syringe equation of motion
Replies
4
Views
2K
Concept subsea PHES system, /advice with calculations
Replies
8
Views
2K
Predicting flow rates of a pressure driven system
Replies
8
Views
2K
Seal friction needed for pneumatic/hydraulic piston
Replies
5
Views
3K
Fluid Mechanics: Bernoulli & Energy Equations Problem- Help?
Replies
3
Views
4K
Modeling Air Compression Cylinder
Replies
45
Views
5K
What's the pressure long before the fluid exits a pipe?
Replies
13
Views
1K
How to calculate how much energy a pneumatic system would need?
Replies
23
Views
2K

Hot Threads

Recent Insights

Back
Top