Which Point Has the Lowest Pressure in a Fluid System?

AI Thread Summary
In a fluid system with a large surface area compared to tube diameter, the assumptions about velocities at different points are crucial. The inlet velocity (VB) may equal the exit velocity (VE) if the tube diameter remains constant, but the possibility of VB being zero is also considered. The lowest pressure point is debated between PC and PE, with questions about whether pressures PB and PE are equal. Additionally, the pressure at point PD is questioned, and the impact of stationary fluid motion on pressure values is explored. Clarifying these points is essential for understanding fluid dynamics in this context.
MechaMZ
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Homework Statement



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Let's say the surface of the fluid is very big as compare to the tube diameter.
Are my assumptions below correct?

VA=0

VB(inlet of the tube) = VE, i think so because the diameter of the tube is constant.
And the velocity through the tube all are constant.

or VB(inlet of the tube) = 0? but it could be right?

Which point has the lowest pressure? should be PC or PE?

Are the pressure of PB and PE the same?

Is the PD = 0?

will all the pressure be different value if the fluid in a stationary motion?

thanks all.
 
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