A fifty-video course to understand fluid flows and solve problems like a professional.
I am Olivier Cleynen and I will teach you fluid mechanics as if you were my new work colleague.
You will learn how to think like a fluid dynamicist — how to frame problems, compute the key quantities, and decide what is important in your fluid flow.
I have a PhD in fluid mechanics but this course is not academic. I cut the usual fluff (edge cases, made-up laminar flows, long proofs) to get to the important stuff:
How to deal with turbulence
Which equations will tell you what
How CFD software works (and why it’s so slow!)
How to find out what controls a specific flow.
To be comfortable in this course, you will need solid high-school-level math & physics (vectors, calculus, solid mechanics). From there, we will progress rapidly, in 50 lessons of ten minutes each.
Register here to be notified when the course launches in Q1 2026. Early applicants and undergrad students will receive a discount.
Here is a preview of the course: ↓
1 Basic flow quantities
Fundamental concepts required to dive into fluid mechanics
1.1 How to think of a fluid
1.2 Density
1.3 Viscosity
1.4 Mass flow and volume flow
1.5 Fluids respond to things
1.6 A first look at turbulence
1.7 Critical questions: time dependency
1.8 Critical questions: Reynolds number
1.9 Turbulence and stability
2 Analysis of existing flows
Quantify the forces, moments, and powers associated with an existing flow
2.1 Mass balance
2.2 Visualizing mass balance
2.3 Mass balance: an example
2.4 Mass balance: annother example
2.5 Momentum balance
2.6 Momentum balance: an example
2.7 Energy balance
2.8 Energy balance: example
2.10 Kill the Bernoulli equation
2.11 Non-uniform and unsteady flows
2.12 Limits of this method
3 Working with pressure and shear
Quantify the effect of pressure and shear in fluids
3.1 Pressure on hard surfaces
3.2 Pressure on hard surfaces: example
3.3 Pressure within fluids
3.4 Special case: buoyancy
3.5 Shear on hard surfaces
3.6 Shear on hard surfaces: example
3.7 Shear within fluids
3.8 Shear perpendicular to a surface
3.9 Shear and velocity
4 Prediction of fluid flows: theory and practice
Understand how fluid flow is calculated using computers (Computational Fluid Dynamics)
4.1 Fields, not trajectories
4.2 Time changes on a grid: example
4.3 Time changes on a grid
4.4 Mass balance equation: general case
4.5 Mass balance equation: incompressible flow
4.6 Momentum balance: general case
4.7 Momentum balance: incompressible flow
4.8 Energy balance
4.9 CFD: discretizing the momentum equation
4.10 CFD: the most basic loop
4.11 CFD: modeling turbulence
4.12 CFD: recap
5 Deciding what matters
Identify which parameters influence your flow, and which don’t
5.1 Scales in fluid mechanics
5.2 Non-dimensional momentum balance
5.3 Important flow parameters
5.4 Difficulties equating parameters
5.5 Revisiting turbulence
5.5 Comparing results: coefficients
5.6 Comparing results: one example
5.7 Comparing results: another example
5.8 Deciding what matters: recap
For step-by-step updates, follow Olivier on Linkedin; To be notified when the course releases, register above!
