Relationship of discharge and minor loss coefficient

AI Thread Summary
The discussion focuses on the relationship between the discharge coefficient (Cd) and the minor loss coefficient (k) in fluid dynamics, particularly regarding head loss (hl) and pressure drop (Δp). It references equations involving air density (ρ), pipe cross-sectional area (A), air velocity (u), and mass flow (m). The validity of the equations is supported by external sources, including a Neutrium article and Wikipedia. A specific concern is raised about the implications when the minor loss coefficient (k) is less than or equal to 1, questioning the complexity of this scenario. Overall, the relationship between these coefficients is crucial for understanding fluid flow in systems.
mg-eng
Messages
2
Reaction score
0
What is relationship between discharge coefficient and minor loss coefficient. Am I right with that equations?
Mechanika_p_yn_w.png

hl – minor head loss
k – minor loss coefficient
ρ – air density
A – pipe cross section area
Cd – discharge coefficient
Δp – pressure drop
u – air velocity
m – mass flow

here is written that it is true:
https://neutrium.net/fluid_flow/discharge-coefficient-for-nozzles-and-orifices/
https://en.wikipedia.org/wiki/Discharge_coefficient

but what with case when k <= 1 ?
 
Engineering news on Phys.org
is that question too difficult?
 

Thread 'Race car suspension Class'

Posted June 2024 - 15 years after starting this class. I have learned a whole lot. To get to the short course on making your stock car, late model, hobby stock E-mod handle, look at the index below. Read all posts on Roll Center, Jacking effect and Why does car drive straight to the wall when I gas it? Also read You really have two race cars. This will cover 90% of problems you have. Simply put, the car pushes going in and is loose coming out. You do not have enuff downforce on the right...
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 'Cantilever help'

I'm trying to decide what size and type of galvanized steel I need for 2 cantilever extensions. The cantilever is 5 ft. The space between the two cantilever arms is a 17 ft Gap the center 7 ft of the 17 ft Gap we'll need to Bear approximately 17,000 lb spread evenly from the front of the cantilever to the back of the cantilever over 5 ft. I will put support beams across these cantilever arms to support the load evenly
View full post »

Similar threads

Hydraulic Head Loss (minor) loss coefficient References?
Replies
8
Views
3K
Nozzle loss coefficient that increases with Reynolds number?
Replies
3
Views
2K
Pressure loss in an HVAC system
Replies
19
Views
3K
Discharge of a Pressure Vessel Containing Liquid Nitrous Oxide
Replies
14
Views
3K
Modeling Air Compression Cylinder
Replies
45
Views
5K
Concept subsea PHES system, /advice with calculations
Replies
8
Views
2K
Relationship between volumetric flow rate and pressure
Replies
3
Views
5K
Calculating pressure at pressure relief valve outlet
Replies
4
Views
4K
Huge pressure drop after changing pipe length (Don't think it's loss)
Replies
13
Views
4K
Pressure loss to double wall pipe (ventilation)
Replies
13
Views
3K

Hot Threads

Recent Insights

Back
Top