Fluid%20Mechanics%20Principles%20

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Fluid Mechanics Principles Applications

• Educate.spsu.edu/faculty website
• SPSU e-mail
• afm
• Syllabus
• Notes - schedules
• Power Point

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AFM

• Outcomes
• Credits
• Text Applied Fluid Mechanics, 6th Edition,
  Robert Mott

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AFM

• Impacts chemical manufacture, automobile
  systems, electrical generation, petroleum
  refining, water treatment

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AFM

• Extensive impact on everyday life
• Home hot water system
• Potable water
• Waste water
• Natural gas
• HVAC
• Refrigeration

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AFM

• Automobiles fuel system, cooling system, brakes,
  power steering
• Manufacturing machine operations
• Farming harvesting
• Construction earth moving
• Mining
• Aircraft control surfaces, landing gear

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AFM

• Mathematical approach ? empirical approach
• AFM basics ? working equation ? application

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Practice
Text examples, class examples, homework, tests
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AFM

• Learn A
• A basis for learning B
• Read text
• Examples
• Homework
• Questions
• One minute paper

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AFM

• Learning Styles Improves understanding and
  retention.
• Active work problems, apply in lab, discuss in
  class, explain to someone.
• Visual pictures, diagrams, demonstrations.
• Sequential build knowledge in logical steps

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AFM

• You can take this course one of two ways,
  seriously or again. Dr. Neathery Oklahoma
  State Univ.

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AFM

• Technicians trained in set procedures focus on
  how, what, when.
• Engineers learned basics know why. Broader
  knowledge base.

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AFM

• No cookbook
• Orderly/logical approach
• Read carefully
• Describe system
• Sketch
• Assumptions
• Principles working equations tables graphs
• Solve
• Reasonable

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Approach

• Most difficulties encountered are due not to
  lack of knowledge, rather due to lack of
  organization (of what you know). Dr. Cengel,
  N.C. State Univ.

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AFM

• Assumptions reasonable

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Solve Equation

• Include units
• Consistent unit system
• Significant digits
• Equation is a representation of an actual
  physical process, not an exercise in mathematics.

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AFM

• Reasonable result
• Make sense?
• Sign
• Units
• Magnitude

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AFM

• Presentations in real world bosses customers
  logical, neat, orderly
• In AFM, to Instructor. Use same standard

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AFM

• Solid mechanics objects stationary (statics) or
  moving (dynamics)
• Fluid mechanics fluids at rest or in motion
• Gas fills available volume no resistance to
  stress
• Liquid limited volume responds to stress by
  continuous deformation.

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AFM

• Gases compressible
• Liquids ordinarily incompressible.
• Hydrostatics
• Hydrodynamics closed pipe, open channel,
  external flow

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Unit Systems

• SI
• USCS

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Properties

• Characteristics of system
• Mass
• Weight
• Density
• Specific weight
• Specific gravity

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Properties

• Specific volume
• Ideal gas law
• Compressibility bulk modulus
• Temperature
• Engineering
• Absolute

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Viscosity

• Resistance to deformation
• Proportionality constant
• Absolute
• Kinematic
• Saybolt viscometer
• Viscosity index

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SAE viscosity

• SAE10W-40
• 10W for cold cranking engine
• 40 for engine operating temperature

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Viscosity

• Temperature dependence
• Liquid
• Gas
• Shear dependence - rheology

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Pressure

• Intensity of a force
• System property
• Vs reference gage, atmospheric, absolute
• Pascals Paradox
• Manometer
• Barometer
• U-tube

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Examples

• Mercury manometer is connected to an air duct to
  measure its insice pressure. The manometer
  deflection is 15mm. Atmospheric pressure is
  100kPa. Find the ducts absolute pressure. Hg ?
  13,600kg/m3.

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Examples

• Refer figure. Find the manometer deflection.

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Pascals Law

• An increase in pressure in an enclosed system
  will be transmitted throughout the entire system.

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Hydraulic jack Homework

• Exert 100N on jack handle support what force?

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Homework

• Oil with a specific gravity 0f 0.8 forms a layer
  0.9m deep in an open tank that is otherwise
  filled with water having a depth of 2.10m. The
  water temperature is 10oC.
• Calculate h
• Calculate P at the bottom of the tank in gage
  pressure

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Assignment

• Mott Chapters 1 2

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QUESTIONS

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References

• Images examples
• Fluid Mechanics Fundamentals Applications, 6th
  Edition, Cengel Cimbala, McGraw Hill
• Applied Fluid Mechanics, 6th Edition, Mott,
  Prentice Hall
• Engineering Fluid Mechanics, 5th Edition Crowe,
  Elger, Roberson, Wiley
• Which of the problems were helpful?
• Why?