Three-dimensional instability of plane channel flows at subcritical Reynolds numbers
Abstract
A three-dimensional instability that predicts subcritical transition in plane channel flows in good agreement with experiment is discussed. Both full simulations of the Navier-Stokes equations and a three-dimensional linear analysis about two-dimensional finite amplitude states confirm that two-dimensional secondary flows are strongly unstable to small three-dimensional perturbations.
- Publication:
-
Symposium on Numerical and Physical Aspects of Aerodynamic Flows
- Pub Date:
- 1981
- Bibcode:
- 1981snpa.proc.....O
- Keywords:
-
- Channel Flow;
- Couette Flow;
- Flow Stability;
- Laminar Flow;
- Navier-Stokes Equation;
- Reynolds Number;
- Three Dimensional Flow;
- Chebyshev Approximation;
- Eigenvalues;
- Galerkin Method;
- Orr-Sommerfeld Equations;
- Parallel Flow;
- Shear Flow;
- Two Dimensional Flow;
- Fluid Mechanics and Heat Transfer