Spectral Galerkin Discretization for Hydrodynamic Stability Problems

  title={Spectral Galerkin Discretization for Hydrodynamic Stability Problems},
  author={Jens Markus Melenk and N. P. Kirchner and Christoph Schwab},
A spectral Galerkin discretization for calculating the eigenvalues of the Orr-Sommerfeld equation is presented. The matrices of the resulting generalized eigenvalue problem are sparse. A convergence analysis of the method is presented which indicates that a) no spurious eigenvalues occur and b) reliable results can only be expected under the assumption of scale resolution, i.e., that Re/p 2 is small; here Re is the Reynolds number and p is the spectral order. Numerical experiments support that… CONTINUE READING