FLUID STATICS

Fluid statics is all about pressure. Here are the rules;
1. Pressure at any point in a fluid is the same in all directions
2. Pressure at the wall of any vessel is perpendicular to the wall
3. Pressure is transmitted through static fluids without loss (Pascal's principle)
4. Pressure due to depth is P = g h, and is the same at any horizontal level of connected fluid. 

Lecture Notes:  Fluid-Statics.pdf    Fluid-Statics.one

 

Fluid Statics 1. Pressure at any point in a fluid is the same in all directions

2. Pressure at the wall of any vessel is perpendicular to the wall

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3. Pressure is transmitted through static fluids without loss (Pascal's principle)

Ref 1

4. Pressure due to depth is P = g h, and is the same at any horizontal level of connected fluid.


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Manometers

Pressure proportional to height difference.  P = g h.


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A vacuum (barometer).
The vacuum does not "pull", the atmosphere "pushes". Fluids never pull (except for very weak surface tension).

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Pressure on Submerged Surfaces

Acts through centre of pressure, which is at the centoid of the area.

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Buoyancy

Turning moment between the centre of gravity G of vessel and centre of buoyancy B (the center of gravity of the displaced water)

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Hydrostatic buoyancy simulator. (Tim Lovett 2004)
hydrostatic_roll.exe (88kB)
Explained here: http://www.worldwideflood.com/ark/stability/roll_stability_calculator.htm


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Ref 1: Illustrations from http://www.scribd.com/doc/10988770/Pressure-Fluid-Statics
Ref 2: Illustrations from http://www.worldwideflood.com/ark/stability/roll_stability_calculator.htm

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