Ch 2. Fluid Statics Multimedia Engineering Fluids PressureVariation PressureMeasurement HydrostaticForce(Plane) HydrostaticForce(Curved) Buoyancy
 Chapter 1. Basics 2. Fluid Statics 3. Kinematics 4. Laws (Integral) 5. Laws (Diff.) 6. Modeling/Similitude 7. Inviscid 8. Viscous 9. External Flow 10. Open-Channel Appendix Basic Math Units Basic Equations Water/Air Tables Sections Search eBooks Dynamics Fluids Math Mechanics Statics Thermodynamics Author(s): Chean Chin Ngo Kurt Gramoll ©Kurt Gramoll

 FLUID MECHANICS - CASE STUDY SOLUTION Problem Diagram I By assuming the fluid is incompressible and at rest, the hydrostatic pressure distribution is expressed as:      p1 = ρgh + p0 From standard handbooks, it is noted that the atmospheric pressure at the sea level is p0 = 101.3 kPa and the acceleration of gravity is g = 9.8 m/s2. At fresh water temperature of 16oC, the density of water = 999 kg/m3 and the density of seawater = 1030 kg/m3. Problem Diagram II The absolute pressure at a depth of 12 meters of water is      p1 = (999 kg/m3) (9.8 m/s2) (12 m) + 101.3 kPa          = 219 kPa whereas for seawater:      p1 = (1030 kg/m3) (9.8 m/s2) (12 m) + 101.3 kPa          = 222 kPa Therefore, it can be concluded that the density of the fluid (fresh water vs. seawater) in this scenario plays a very small role (1%) in the design criteria.

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