Indian Pedagogical Workshop
3 – 15 December, 2018
Herbert E. Huppert
1. Convection2. Plumes3. Gravity currents and CCS4 Flow in porous media
Presentation Chapters
Navier-Stokes equations:
(ut + u.u) -p + 2u g + F
Sir George Gabriel Stokes PRS1819 ‐‐ 1903
Claude‐ Louis Navier1785 ‐‐1836
Joseph Boussinesq1842 ‐‐ 1929
Chapter 1 Convection
Simplest geometry
Outline of (linear) stability calculations
Write down full (nonlinear equations)
Determine (simple) steady state – in this case the linear conduction solution.
Expand with (linear) perturbation ~ W(z)*exp[i(kx‐st)] (travelling wave)
W(z) * exp[i(kx‐st)]
Linearize resulting equations and bc’s to obtain eigenvalue equation for s (k)
imag (s) < 0 decaying (stable) mode
imag (s) = 0 neutral stability
imag (s) > 0 UNSTABLE
(3rd) Lord RayleighJohn Strutt1842‐1919
Henri Benard1874‐1938
Layers due to boundary layer confinement of ice melting in a stratified medium
Take home messages
• Sit on desk• Grand title