Filtering of the pressure spurious modes in P-N-P-N spectral approximations of the Stokes system
In the framework of Jacobi polynomials based spectral methods, the P-N-P-N approximation of the Stokes system generally shows the drawback that the pressure kernel does not reduce to the constant field. However, this drawback goes together with the advantage that the velocity field may be perfectly solenoidal, i.e. the divergence of the velocity is the null polynomial. In this paper we suggest a filtering algorithm to recover the pressure in an efficient way. (C) 2002 Elsevier Science Ltd. All rights reserved.
pressure spurious modes spectral methods navier-stokes equations