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ME201: Fluid Mechanics

Unit 1: Introduction to Fluid Statics and Flow Phenomena   This first unit introduces the basic concepts you will need to know in order to understand fluids and how they behave.  We will first establish a working definition of the word “fluid” before examining properties specific to fluids, including viscosity (a fluid’s resistance to flow) and compressibility (how a fluid’s volume changes when pressure is applied to it).
             
We will then study how fluids act in static, motionless situations.  One practical application of this study is the understanding of buoyancy – or to what degree objects sink or float when suspended in a fluid.

Unit 1 Time Advisory
This unit will take you approximately 14 hours to complete.

☐    Subunit 1.1: 3 hours

☐    Subunit 1.2: 2 hours

☐    Subunit 1.3: 2 hours

☐    Subunit 1.4: 2 hours

☐    Subunit 1.5: 2 hours

☐    Subunit 1.6: 2 hours

☐    Subunit 1.7: 1 hour

Unit1 Learning Outcomes
Upon successful completion of this unit, the student will be able to:
- Define fluids. - Identify fluid properties. - Classify basic flow phenomena. - Visualize flows using streamlines, pathlines, and streaklines. - Define vapor pressure and surface tension of a fluid and demonstrate their relationship - Calculate pressure in static fluid and perform buoyancy calculations.

1.1 Defining a Fluid   - Reading: University of Kentucky: Professor J. M. McDonough’s Lectures Notes on Introduction to Fluid Mechanics: “Lectures on Elementary Fluid Dynamics” Link: University of Kentucky: Professor J. M. McDonough’s Lectures Notes on Introduction to Fluid Mechanics: “Lectures on Elementary Fluid Dynamics” (PDF)

 Instructions: Please click on the hyperlink “Lecture Notes, 2.2MB,
PDF” after the ME330: *Elementary Fluid Dynamics* title to download
the PDF file for these lecture notes.  Read pages 1-13.  This
reading will introduce you to fluids and applications of fluids in
science and technology.  You will also learn about the study of
fluids using experimental and theoretical approaches.  You may
consider saving this PDF file as you will return to this material
throughout this course.  
    
 Terms of Use: Please respect the copyright and terms of use
displayed on the webpage above.
  • Reading: University of Iowa: Professor Fred Stern’s Lectures Notes on Fluid Mechanics: “Chapter 1: Introduction and Basic Concepts” Link: University of Iowa: Professor Fred Stern’s Lectures Notes on Fluid Mechanics: “Chapter 1: Introduction and Basic Concepts” (PDF)

    Instructions: Please scroll down the webpage and click on the hyperlink “Chapter 1” under “Lecture Notes” on the left side of the webpage to download the PDF file for Chapter 1.  Read pages 1-15.  This reading will introduce you to definition of fluids and several fundamental concepts of fluid mechanics such as Newtonian fluid and the continuum hypothesis.  You may consider saving this PDF file as you will return to this material throughout this course.
     
    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

1.2 Fluid Properties   - Reading: University of Kentucky: Professor J. M. McDonough’s Lectures Notes on Introduction to Fluid Mechanics: “Lectures on Elementary Fluid Dynamics” Link: University of Kentucky: Professor J. M. McDonough’s Lectures Notes on Introduction to Fluid Mechanics: “Lectures on Elementary Fluid Dynamics” (PDF)

 Instructions: Please download the PDF file for Lecture Notes of
ME330: *Elementary Fluid Dynamics* and read pages 15-24.  This
reading will introduce you to basic properties of a fluid, including
viscosity, density, thermal conductivity and mass diffusivity.  

 Terms of Use: Please respect the copyright and terms of use
displayed on the webpage above.
  • Reading: University of Iowa: Professor Fred Stern’s Lectures Notes on Fluid Mechanics: “Chapter 1: Introduction and Basic Concepts” Link: University of Iowa: Professor Fred Stern’s Lectures Notes on Fluid Mechanics: “Chapter 1: Introduction and Basic Concepts” (PDF)

    Instructions: Please download the PDF file for Chapter 1 and read pages 6-15.  In this lecture, you will learn about the basic measures of fluid mass and weight (e.g. density, specific weight, and specific gravity).
     
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1.3 Classification of Flow Phenomena   - Reading: University of Kentucky: Professor J. M. McDonough’s Lectures Notes on Introduction to Fluid Mechanics: “Lectures on Elementary Fluid Dynamics” Link: University of Kentucky: Professor J. M. McDonough’s Lectures Notes on Introduction to Fluid Mechanics: “Lectures on Elementary Fluid Dynamics” (PDF)
 
Instructions: Please download the PDF file for Lecture Notes of ME330: Elementary Fluid Dynamics and read pages 29-40.  You will learn basic types of fluid flow in this lecture.  Note that this reading will cover the material you need to know for subunits 1.3.1-1.3.7.

 Terms of Use: Please respect the copyright and terms of use
displayed on the webpage above.
  • Web Media: University of Iowa: Professor Fred Stern’s Fluid Mechanics Video Gallery Link:  University of Iowa: Professor Fred Stern’s Fluid Mechanics Video Gallery (Quicktime)
     
    Instructions: Click on the link to “Video Gallery” at the top of the webpage.  Then, click the hyperlink for Chapter 1 and watch all five video segments on the webpage. Each video segment lasts about 1-2 minutes.

    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

1.3.1 Steady and Unsteady Flows   1.3.2 Flow Dimensionality   1.3.3 Uniform and Non-Uniform Flows   1.3.4 Rotational and Irrotational Flows   1.3.5 Viscous and Inviscid Flows   1.3.6 Incompressible and Compressible Flows   1.3.7 Laminar and Turbulent Flows   1.4 Flow Visualization   - Reading: University of Kentucky: Professor J. M. McDonough’s Lectures Notes on Introduction to Fluid Mechanics: “Lectures on Elementary Fluid Dynamics” Link: University of Kentucky: Professor J. M. McDonough’s Lectures Notes on Introduction to Fluid Mechanics: “Lectures on Elementary Fluid Dynamics” (PDF)
 
Instructions: Please download the PDF file for Lecture Notes of ME330: Elementary Fluid Dynamics and read pages 41-44.  You will learn how to visualize flows using streamlines, pathlines, and streaklines.

 Terms of Use: Please respect the copyright and terms of use
displayed on the webpage above.
  • Web Media: University of Iowa: Professor Fred Stern’s Fluid Mechanics Video Gallery Link:  University of Iowa: Professor Fred Stern’s Fluid Mechanics Video Gallery (Quicktime)
     
    Instructions: Click on the link to “Video Gallery” at the top of the webpage.  Then, click the hyperlink for Chapter 4 and watch all six video segments on the webpage.  Each video segment lasts about 1-2 minutes.

    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • Web Media: MIT: Professor Ascher Shapiro’s National Committee for Fluid Mechanics Films: “Flow Visualization” Link:MIT: Professor Ascher Shapiro’s National Committee for Fluid Mechanics Films: “Flow Visualization” (RealPlayer)
     
    Instructions: Download and watch the movie “Flow Visualization.”  The length of the movie is 29 minutes.  Please also download and read the companion film notes.

    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

1.5 Vapor Pressure and Surface Tension   - Reading: University of Iowa: Professor Fred Stern’s Lectures Notes on Fluid Mechanics: “Chapter 1: Introduction and Basic Concepts” Link: University of Iowa: Professor Fred Stern’s Lectures Notes on Fluid Mechanics: “Chapter 1: Introduction and Basic Concepts” (PDF)
 
Instructions: Please download the PDF file for Chapter 1 and read pages 18-23.  In this reading, you will learn about vapor pressure and surface tension.

 Terms of Use: Please respect the copyright and terms of use
displayed on the webpage above.
  • Web Media: MIT: Professor Ascher Shapiro’s National Committee for Fluid Mechanics Films: “Surface Tension in Fluid Mechanics” Link:  MIT: Professor Ascher Shapiro’s National Committee for Fluid Mechanics Films: “Surface Tension in Fluid Mechanics” (RealPlayer)
     
    Instructions: Download and watch the movie “Surface Tension in Fluid Mechanics.”  The length of the movie is 29 minutes.  Please also download and read the companion film notes.

    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

1.6 Pressure in Static Fluid   - Reading: University of Iowa: Professor Fred Stern’s Lectures Notes on Fluid Mechanics: “Chapter 2: Pressure and fluid statics” Link: University of Iowa: Professor Fred Stern’s Lectures Notes on Fluid Mechanics: “Chapter 2: Pressure and fluid statics” (PDF)
 
Instructions: Please download the PDF file for Chapter 2 and read the entire document. In this reading, you will learn how to calculate pressure in static fluids.  We now understand the basic properties of fluids.  We will now begin to study how fluids can be used to measure air pressure and examine how they affect and apply forces to submerged objects (like the bottom of a boat, for example).

 Terms of Use: Please respect the copyright and terms of use
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  • Lecture: Gases and Incompressible Liquids The Saylor Foundation does not yet have materials for this portion of the course. If you are interested in contributing your content to fill this gap or aware of a resource that could be used here, please submit it here.

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  • Lecture: Indian Institute of Technology (IIT) Bombay: Professor T. I. Eldho’s “Lecture 3 – Fluid Statics” Link: Indian Institute of Technology (IIT) Bombay: Professor T. I. Eldho’s “Lecture 3 – Fluid Statics” (YouTube)
     
    Instructions: Please watch this video (52:09 minutes), which will introduce you to basic equations of static fluids.

    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

Review Questions for Unit 1   - Assessment: The Saylor Foundation’s “ME201: Unit 1 Assessment” Link: The Saylor Foundation’s “ME201: Unit 1 Assessment” (HTML)
 
Instructions: Please perform this exercise.  

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