Mathematical background
The stability analysis considers disturbance as the small deviation from the steady state. The unsteady solution of the Navier-Stokes equation is expressed as the sum of the steady solution and the disturbance:
In resulting disturbance equation
the space and time dependence is separated:
The partial differential eigenvalue problem
is linearised and discretized with penalty FEM:
It is a generalized eigenvalue problem:
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Last modified: Wed Dec 15 11:25:30 CET 1999
