FLUID MECHANICS AND MACHINERY Department of Mechanical Engineering Department.
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FLUID MECHANICS AND MACHINERY
Department of Mechanical Engineering Department
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INTRODUCTION
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Why do swimmers float better in the ocean than in a lake?
Which is denser, Earth or the sun?
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•Properties of fluids •Vapour pressure and gas laws •Capillarity and surface tension •continuity equation •Energy equation
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FLOW THROUGH CIRCULAR CONDUITS
Laminar flow through circular conduits and circular annuli
Boundary layer concepts
Hydraulic and energy gradient
Friction factor and Moody diagram
Flow though pipes in series and in parallel
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• Calculate frictional losses for laminar and turbulent flow through circular and non-circular pipes
• Define the friction factor in terms of flow properties
• Calculate the friction factor for laminar and turbulent flow
• Define and calculate the Reynolds number for different flow situations
• Derive the Hagen-Poiseuille equation
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DIMENSIONAL ANALYSIS
Dimension and units: Buckingham’s П theorem
Discussion on dimensionless parameters
Applications of dimensionless parameters
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Continuum Hypothesis
In this course, the assumption is made that the fluid behaves as a continuum, i.e., the number of molecules within the smallest region of interest (a point) are sufficient that all fluid properties are point functions (single valued at a point).
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ROTO DYNAMIC MACHINES
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Types
Non-Positive DisplacementFansFluid couplers
Positive DisplacementGearVane*Piston*
* Can be variable displacement, including pressure compensated and load sensing.
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Thank You