Boulder School 2022: Lecture Notes and Videos

All slides will be posted in PDF format. To access videos of the lectures, please follow us on and subscribe to our YouTube Channel BSS Physics School. Please see Reading Materials for any required reading.

Week 1, July 4-8, 2022

July 4

  • Welcome and School Introduction [Video]
  • G. Falkovich, Introduction to hydrodynamics I [Textbook] [Video]
    • Definitions: continuous medium, fluidity, Deborah number. Difference between solid and fluid - time of observation. Sect. 1.1.1
    • No tangential forces - ideal fluid. Euler, continuity and entropy equations. Sect. 1.1.2.
      Fluid particles keep their mass and entropy but exchange momentum and energy - two different forms of Eulerian and Lagrangian conservation laws. Sect 1.2
      Simplest flow: isentropic, potential incompressible. The first renormalization in physics: added mass. Force exerted by the fluid on the body - the time derivative of the quasi-momentum, not momentum. Sect. 1.3.1
  • K. R. Sreenivasan, Quantum turbulence [Notes] [Video]
  • J. Oishi, Using Dedalus I [Notes] [Video]

July 5

  • G. Falkovich, Introduction to hydrodynamics II [Video]
    • Derivation of quasi-momentum. Acceleration of shrinking bodies. No-resistance paradox for steady motion. Sect. 1.3.2-3.
    • Introducing viscous friction, Sect. 1.4.2. Navier-Stokes equation, Sect. 1.4.3. Reynolds number, Sect 1.4.4.
    • Boundary layer separation and the first anomaly in physics, Sect 1.5.2.
  • K. R. Sreenivasan, Fluid mechanics of the Sun [Notes] [Video]
  • J. Oishi, Using Dedalus II [Notes] [Video]

July 6

July 7

  • T. Shaw, Large-scale circulation II [Notes] [Video]
  • J. Yeomans, Active nematics II [Slides] [Video]
  • G. Falkovich, Introduction to hydrodynamics III [Video]
    • Flow transformations on the way from low to high Reynolds numbers. Sect. 1.5.3.
    • Drag with a wake expressed via the flow deficit. Arbitrarily small viscosity changes flow in all space, not only in the wake. Sect. 1.5.4.
    • Turbulent cascade and the dissipative anomaly. Sect. 2.2.2.

July 8

Week 2, July 11-15, 2022

July 11

July 12

  • K. Julien, Rotating convection II [Notes] [Video]
  • H. Alui, Subgrid modeling II [Video]
  • A. Venaille, Topological waves II [Video]

July 13

July 14

  • F. Bouchet, Large deviation theory II [Notes] [Video]
  • A. Venaille, Topological waves III [Video]
  • Y. Tu, Active matter II [Notes] [Video]

July 15

Week 3, July 18-22, 2022

July 18

  • N. Goldenfeld, Modeling the transition to turbulence I [Blackboard] [Notes] [Video]
  • B. Fox-Kemper, Ocean dynamics I [Notes] [Video]
  • Public Lecture: B. Fox-Kemper, Climate and Sea Level Change: Are U.N. Trouble? [Notes] [Video]

July 19

July 20

July 21

  • S. Tobias, Direct statistical simulation II [QL-GQL Lecture] [Notes] [Video]
  • E. Zweibel, Fluids at very largest scales II [Video]
  • N. Goldenfeld, Modeling the transition to turbulence III [Video]

July 22

  • S. Tobias, Direct statistical simulation III [Notes] [Video]
  • E. Zweibel, Fluids at very largest scales III [Video]
  • What have we learned? [Video]

Week 4, July 25-29, 2022

July 25

July 26

  • S. Fielding, Complex fluids (theory) II [Video]
  • S. Nagel, Complex fulids (expt.) II [Video]
  • D. Son, Quantum Hall liquids I [Video]

July 27

  • S. Fielding, Complex fluids (theory) III [Video]
  • T. Powers, Swimmers II [Video]
  • D. Son, Quantum Hall liquids II [Video]

July 28

  • T. Powers, Swimmers III [Video]
  • D. Son, Quantum Hall liquids III [Video]

July 29

  • R. Zia, Non-equilibrium Statistical Mechanics: a personal perspective [Video]
  • School discussion & summary [Video]