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Chapter 12 Physics notes- Fluid Mechanics

by: Mythri Partha

Chapter 12 Physics notes- Fluid Mechanics phys 1321

Marketplace > University of Houston > Physics 2 > phys 1321 > Chapter 12 Physics notes Fluid Mechanics
Mythri Partha
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About this Document

These notes cover chapter 12 of university physics 1, which is fluid mechanics
University Physics 1
Dr. Ordonez, Dr. Miller
Class Notes
Physics, fluid, mechanics, physics2, Miller, ordonez, reiter, chu




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This 2 page Class Notes was uploaded by Mythri Partha on Wednesday April 20, 2016. The Class Notes belongs to phys 1321 at University of Houston taught by Dr. Ordonez, Dr. Miller in Spring 2016. Since its upload, it has received 30 views. For similar materials see University Physics 1 in Physics 2 at University of Houston.


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Date Created: 04/20/16
PHYSICS 1321 CHAPTER 12 –FLUID MECHANICS 1. Density (ρ)  Very important property of material , fluid or solid.  2 or more objects can have same density despite having different masses and volume if they are made of the same material.  Mass per unit volume 3  SI unit : kg/m  ρ=m/V 2. Pressure in fluid (p)  It is the force exerted per unit area.  The force exerted is perpendicular to any surface.  Scalar Quantity  SI unit : 1 Pa = 1 N/m 2  p=(dF)/(dA) 3. Pressure at depth in a fluid  Pressure at depth is greater than pressure p whic0 is at surface  p=p +0ρgh --------- (1)  In a column, the pressure at the top of each liquid column is p . At 0he bottom , the pressure is p. The difference in p and p is ρ0h. 4. Pascal’s Law  Pressure applied to an enclosed fluid is transmitted to every potion of the fluid undiminished and equally.  p=(F )1(A )1= (F )2(A )2 5. Absolute Pressure and Gauge Pressure  Total pressure is p atm .  The excess pressure above atmospheric pressure is called gauge pressure .  If the pressure applied is less than atmospheric , the gauge pressure is negative. 6. Archimedes’ Principle  When a body is submerged in water , it weighs less as compared to when in air.  Principle : When a body is completely or partially immersed in fluid , the fluid exerts an upward force on the body equal to the weight of the fluid displaced by the body. 7. Surface Tension  For instance , in a water body , the molecule at the surface is pulled into the bulk liquid . This reduces the liquid’s area on the surface. 8. Fluid Flow  An individual particle moves in a fluid and the path is known as flow line.  In steady flow , the flow line remains the same.  At high flow rates , the flow becomes non steady. 9. Continuity Equation  For an incompressible fluid : A v =A1V1 2 2 10.Bernoulli’s Equation  p 1 ρgy +1/1ρv 12 = p 2 ρgy +122ρv 22 11.Viscosity  Internal friction in fluid that is , the resistance to flow.  Example Lava , Viscosity decreases as temperature increases. 12.Turbulence  At low flow speeds , flow of a fluid is laminar but when the threshold is exceeded , the flow pattern becomes turbulent.


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