NFYB21003U Fluid Mechanics
Qi-fan Wu, based on the lecture notes of Markus Jochum, Amin Doostmohamadi and Marta Mrozowska 2025
Niels Bohr Institute, University of Copenhagen

The material below is complementary to the lectures; it does not replace them. It does not replace textbooks either; instead, it should be seen as a bridge between the necessary simplifications and idiosyncrasies of classroom teaching and the overwhelming level of detail often found in textbooks. Of course, I will cheerfully accept full responsibility for any errors or misunderstandings which may appear, despite so much assistance I received!

Much of the present material is taken from Kundu's Fluid Mechanics (available online from the KU library); other sources are used and referenced whenever they appeared to be more helpful. Have you spotted a mistake or an error on this page? Click here to tell me!

Introduction and Flow Kinematics
Lecture1A Slide 1
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From Newton's Second Law to the Navier–Stokes Equations
Lecture1B Slide 1
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Boundary Conditions and Gravity Waves
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Internal Waves and Normal Modes in a Continuously Stratified Noninertial Fluid
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Vorticity and Potential Vorticity
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Planetary Waves
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Computational Fluid Dynamics
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Boundary Layers and Turbulent Mixing
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Vorticity Budget on a Rotating Sphere
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Vorticity Budget in the Frictional Boundary Layers
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Dynamic Similarity
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Laminar Flow
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Instability
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Turbulence
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Introduction to Dynamical Systems and Chaos
Lecture8A Slide 1
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Problem Set 1
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Problem Set 2
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Problem Set 3
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Problem Set 4
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Test Exam
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