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- TL;DR Summary
- liquid in mouvement, pressure , Bernoulli equation,

Good morning.

I joined this forum to improve my self and give back what i will learn here for the members of this forum.

I m confused about the notion of pressure and i will explain the point that i don't understand.

since we know that the pressure is the force over surace. and since we know that the liquide pressure is depending to the depth . all is easy now.

so the hard side i did not know is when the liquide starts to move in a long tube for example.

Can you tell me which pressure we mean by the pressure on the tube. i ork in the ship and i always hear that the inlet pressure in fresh water cooler is 4 bars for example , is it the pressure of the up side water or the bottom water on the tube of cooler ?

than what is the pressure we mean in the equation of bernuli. they say the pressure energy exists so i agree because we have a pressure on a surface but is that pressure force is the same on all particuls , why they fix it ?

i really need a help.

i looked

I joined this forum to improve my self and give back what i will learn here for the members of this forum.

I m confused about the notion of pressure and i will explain the point that i don't understand.

since we know that the pressure is the force over surace. and since we know that the liquide pressure is depending to the depth . all is easy now.

so the hard side i did not know is when the liquide starts to move in a long tube for example.

Can you tell me which pressure we mean by the pressure on the tube. i ork in the ship and i always hear that the inlet pressure in fresh water cooler is 4 bars for example , is it the pressure of the up side water or the bottom water on the tube of cooler ?

than what is the pressure we mean in the equation of bernuli. they say the pressure energy exists so i agree because we have a pressure on a surface but is that pressure force is the same on all particuls , why they fix it ?

i really need a help.

i looked