Is Pressure a State Variable in a Fluid Momentum Equation?

AI Thread Summary
Pressure is considered a state variable in the momentum equation for a fluid, even in the absence of temperature terms. It is a fundamental property that helps define the state of the fluid. The discussion emphasizes the need for specific equations or charts to provide more detailed insights. Understanding pressure's role is crucial for analyzing fluid behavior in mechanical contexts. Overall, pressure plays a key role in fluid dynamics and momentum equations.
hoomanya
Messages
86
Reaction score
0
Hi,
Can someone please tell me if pressure is a state variable in a momentum equation for a fluid, considering that the equation is mechanical and does not have any temperature terms.
Thanks!
 
Engineering news on Phys.org
You'll have to provide the equation or chart to receive a more specific response, but as a general rule pressure is a fundamental property that can be used to fix a fluid's state.
 

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

Estimating the force exerted by a water jet on a flat plate - Bernoulli vs Momentum Equation
Replies
11
Views
3K
Measuring the water volume in a small tank with a manometer
Replies
26
Views
2K
Calculating parameters of centrifugal compressor
Replies
20
Views
4K
Scaling pressure drop to other temperatures
Replies
3
Views
2K
Force of pressurized water exiting a hose or pipe?
Replies
20
Views
10K
Where Does Viscous Pressure Enter the Pressure Balance?
Replies
19
Views
2K
Assumption of local thermodynamic equilibrium in a fluid
Replies
10
Views
2K
Pumping power calculation of a vertical closed-loop system
Replies
4
Views
3K
Pressure loss pipe system: Conversion from known fluid1 to fluid2
Replies
8
Views
2K
Why Did the Temperature Rise in a Sealed Automotive Cooling System?
Replies
18
Views
2K

Hot Threads

Recent Insights

Back
Top