- #1
lost captain
- 62
- 2
- TL;DR Summary
- We know that across a horizontal pipe, the pressure will become smaller due to friction. So shouldn't the pressure difference be a negative number?
Across a horizontal pipe with fluid flowing inside, the pressure will drop due to the friction between the fluid and the pipe walls
So if for example the fluid flows from left to right and we take 2 points: P1 (pressure on the left) and P2 (pressure on the right) then P1 should be bigger than P2.
And the pressure difference should be
ΔP = P2 - P1 <0
So pressure difference or pressure drop should be negative. Why is it positive?
So if for example the fluid flows from left to right and we take 2 points: P1 (pressure on the left) and P2 (pressure on the right) then P1 should be bigger than P2.
And the pressure difference should be
ΔP = P2 - P1 <0
So pressure difference or pressure drop should be negative. Why is it positive?