MECE 2860U Study Guide - Final Guide: Hydraulic Head, Stokes Flow, Boundary Layer Thickness
Lecture 24 - Fluid Mechanics Review
Exam at 8AM – New Gym, Thursday April, 13/2017 – 50%
Office Hours, Tuesday/Wednesday 1PM-3PM
20/50 Short Answer Questions
4 Long Answer Questions 30/50
1 – Question Before Midterm
3 – Questions After Midterm
Short Answer
1) Lift and Drag Questions – Race Car Lecture
2) What is the purpose of Non – Dimensionilization – Saves you time, prevents
experimentation, for every single parameter, and only shows the variables that matter
3) What is the Reynolds Number? – Ratio of Inertial Forces to Viscous Forces
4) What is Geometric Similarity, Kinematic and Dynamic Similarity?
5) Take a Model and Prototype, and say what kinds of similarity they have? – Matching
Reynolds Number and Drag Coefficients
6) What and When does Imcomplete Similarity Occur? – Some Numbers Match but some
numbers don’t match, For a Ship, we matched the Velocitys and Length Scales with te
Freude Number. But then in order to match the Reynolds Number we already had scaled
the velocities and Lengths so we could only scale the Viscosities, but theres no liquid in
existence that has that low a viscosity. So To get around this we match experimental
values to theory
7) Scaling with multiple Dependent Parameters in Pumps
What head is composed of, what parameters are important for pumps
8) Incompressible Flow in Pipes with Viscosity - Why do we have to check reynolds
number before pipe flow problems to see turbulent and laminar flow – We can’t answer
turbulent flow questions analytically, only experimentally
9) Transition Point For Laminar to Turbulent – 2300 for Reynolds number
10) Entrance Region – For Laminar Flow in a Pipe, when you have a velocity distrubution
entering a pipe, due to the no slip condition, causing a shear force on the fluid particles at
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