- Question:
- Why “lower branch”,
“upper branch?”
- Answer:
-
The drag I
exerted on the walls and the bulk dissipation rate D
are physical quantities associated with a plane Couette fluid state.
-
-
![[Reynolds/dissipation plot]](Images/D_bNarrow_small.png) |
- Bifurcation diagram
- blue dots
- Upper branch equilibrium EQ2. More structure,
hence higher dissipation.
- blue circles
- Lower branch equilibrium EQ1. Smooth,
hence low dissipation.
|
Saddle-node bifurcation at Re = 218.5... gives birth to the Nagata lower and upper branches.
Also indicated: Dissipation as a function of Reynolds number for other equilibria and
traveling waves.
All solutions in this tutorial are studied at Re=400. |
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