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happyphysics.com Physics Lecture Resources Prof. Mineesh Gulati Head-Physics Wing Happy Model Hr. Sec. School, Udhampur, J&K Website: happyphysics.com
Ch 14 Fluid Mechanics © 2005 Pearson Education
14.1 Density definition of density © 2005 Pearson Education SI unit is kg/m 3
© 2005 Pearson Education
14.2 Pressure in a Fluid © 2005 Pearson Education
Pressure, Depth and Pascal ’ s Law © 2005 Pearson Education
Pascal’s law: Pressure applied to an enclosed fluid is transmitted undiminished to every portion of the fluid and the walls of the containing vessel © 2005 Pearson Education
14.3 Buoyancy © 2005 Pearson Education Archimedes’s principle states: When a body is completely or partially immersed in a fluid, the fluid exerts and upward force on the body equal to the weight of the fluid displaced by the body
14.4 Fluid Flow © 2005 Pearson Education
Ideal fluid: fluid that is incompressible and has no internal friction Ideal fluid: fluid that is incompressible and has no internal friction Flow line: The path of an individual particle in a moving fluid Flow line: The path of an individual particle in a moving fluid Steady flow: If the overall flow pattern does not change with time Steady flow: If the overall flow pattern does not change with time Streamline: is a curve whose tangent at any point is in the direction of the fluid velocity at that point. Streamline: is a curve whose tangent at any point is in the direction of the fluid velocity at that point. © 2005 Pearson Education
continuity equation, incompressible fluid volume flow rate © 2005 Pearson Education
14.5 Bernoulli’s Equation Bernoulli’s equation © 2005 Pearson Education
14.6 Viscosity and Turbulence Viscosity is internal friction in a fluid Viscosity is internal friction in a fluid When the speed of a flowing fluid exceeds a certain critical value, the flow is no longer laminar. Instead, the flow pattern becomes extremely irregular and complex, and it changes continuously with time; there is no steady-state pattern. This is irregular, chaotic flow is called turbulence When the speed of a flowing fluid exceeds a certain critical value, the flow is no longer laminar. Instead, the flow pattern becomes extremely irregular and complex, and it changes continuously with time; there is no steady-state pattern. This is irregular, chaotic flow is called turbulence © 2005 Pearson Education
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