Fluid Mechanics — Introductory Course
An intuitive, interactive introductory Fluid Mechanics course covering the topics typical of the first two years of a mechanical engineering degree. Every lesson pairs plain-language explanations with precise hand-drawn diagrams, worked examples, hands-on simulations, and practice you can check yourself.
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Foundations: Fluid Properties
What makes a fluid a fluid — density, viscosity, and the properties every later module uses.
Fluid Statics
Pressure at rest — manometers, hydrostatic forces, and why things float.
Fluid Kinematics
How to describe a moving fluid — streamlines, velocity fields, and the tool that unlocks control-volume analysis.
Conservation of Mass: Control Volume Analysis
The continuity equation — derived from the Reynolds Transport Theorem, applied to real ducts.
The Energy Equation: Bernoulli & Beyond
Bernoulli's equation and the general Energy Equation, taught as the two genuinely different results they are.
Momentum Equation & Applications
Forces from flowing fluid — bends, nozzles, jet propulsion.
Dimensional Analysis & Similitude
Reduce a messy physical problem to a handful of dimensionless groups.
Viscous (Internal) Flow: Pipe Flow
Laminar vs turbulent flow, where Poiseuille's law comes from, and the Moody chart.
External Flow: Boundary Layers, Drag & Lift
Why things feel drag, and how a wing generates lift.
Open-Channel Flow
Optional extension module — free-surface flow in rivers and canals (civil/mechanical overlap).
Turbomachinery & Capstone
Pumps, system curves, cavitation — and a capstone that designs a real piping system.
New lessons are added continuously. Prefer to test yourself? Try the Mechanical Aptitude test.